diff --git a/CHANGES.rst b/CHANGES.rst
index 1a85654..52a1426 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,7 +4,9 @@ Changes
 4.2.2 (unreleased)
 ------------------
 
-- Nothing changed yet.
+- Fix ``GlobalObject`` (and ``GlobalInterface``) no longer allowing
+  multiple leading dots. See `issue 41
+  <https://github.com/zopefoundation/zope.configuration/issues/41>`_.
 
 
 4.2.1 (2018-09-26)
diff --git a/src/zope/configuration/fields.py b/src/zope/configuration/fields.py
index 70527a5..1730431 100644
--- a/src/zope/configuration/fields.py
+++ b/src/zope/configuration/fields.py
@@ -80,7 +80,7 @@ class GlobalObject(Field):
             # package, but not accepted by DottedName. Take care,
             # though, because a single dot is valid to resolve, but
             # not valid to pass to DottedName (as an empty string)
-            to_validate = name[1:] if name.startswith('.') else name
+            to_validate = name.lstrip('.')
             if to_validate:
                 self._DOT_VALIDATOR.validate(to_validate)
         except ValidationError as v:

Regression in 4.2.x: Multiple leading dots for GlobalObject/Interface fail
For example,
```xml
<adapter factory=".adapters._PayeezyPurchaseAttemptFactory"
		 for="...interfaces.IPurchaseAttempt"
		 for="nti.store.interfaces.IPurchaseAttempt"
		 provides=".interfaces.IPayeezyPurchaseAttempt" />
```

results in
```
  File "//zope.configuration-4.2.1-py2.7.egg/zope/configuration/fields.py", line 120, in fromUnicode
    raise InvalidToken("%s in %s" % (v, u)).with_field_and_value(self, s)
ZopeXMLConfigurationError: File "//store/configure.zcml", line 21.1-21.54
    ZopeXMLConfigurationError: File "//configure.zcml", line 10.1-10.31
    ZopeXMLConfigurationError: File "//payeezy/configure.zcml", line 18.1-20.53
    ConfigurationError: ('Invalid value for', 'for', '..interfaces.IPurchaseAttempt in ...interfaces.IPurchaseAttempt')
```

Apparently the package-relative support is not as well tested here as we would like. I'll submit a PR.
diff --git a/src/zope/configuration/tests/test_fields.py b/src/zope/configuration/tests/test_fields.py
index 6964957..baa4023 100644
--- a/src/zope/configuration/tests/test_fields.py
+++ b/src/zope/configuration/tests/test_fields.py
@@ -95,7 +95,7 @@ class GlobalObjectTests(unittest.TestCase, _ConformsToIFromUnicode):
         self.assertIs(found, _target)
         self.assertEqual(context._resolved, 'tried')
 
-    def test_fromUnicode_w_resolve_dot(self):
+    def test_fromUnicode_w_resolve_dots(self):
         _target = object()
         class Context(object):
             _resolved = None
@@ -105,9 +105,16 @@ class GlobalObjectTests(unittest.TestCase, _ConformsToIFromUnicode):
         go = self._makeOne()
         context = Context()
         bound = go.bind(context)
-        found = bound.fromUnicode('.')
-        self.assertIs(found, _target)
-        self.assertEqual(context._resolved, '.')
+        for name in (
+                '.',
+                '..',
+                '.foo',
+                '..foo.bar'
+        ):
+            __traceback_info__ = name
+            found = bound.fromUnicode(name)
+            self.assertIs(found, _target)
+            self.assertEqual(context._resolved, name)
 
     def test_fromUnicode_w_resolve_but_validation_fails(self):
         from zope.schema import Text

pip install -e .[dev]
parse_log_pytest
requirements.txt
coverage Sphinx repoze.sphinx.autointerface pytest
3.6
requirements/base.txt
pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
alabaster==0.7.13
attrs==22.2.0
Babel==2.11.0
certifi==2021.5.30
charset-normalizer==2.0.12
coverage==6.2
docutils==0.18.1
idna==3.10
imagesize==1.4.1
importlib-metadata==4.8.3
iniconfig==1.1.1
Jinja2==3.0.3
MarkupSafe==2.0.1
packaging==21.3
pluggy==1.0.0
py==1.11.0
Pygments==2.14.0
pyparsing==3.1.4
pytest==7.0.1
pytz==2025.2
repoze.sphinx.autointerface==1.0.0
requests==2.27.1
six==1.17.0
snowballstemmer==2.2.0
Sphinx==5.3.0
sphinxcontrib-applehelp==1.0.2
sphinxcontrib-devhelp==1.0.2
sphinxcontrib-htmlhelp==2.0.0
sphinxcontrib-jsmath==1.0.1
sphinxcontrib-qthelp==1.0.3
sphinxcontrib-serializinghtml==1.1.5
tomli==1.2.3
typing_extensions==4.1.1
urllib3==1.26.20
zipp==3.6.0
-e git+https://github.com/zopefoundation/zope.configuration.git@722d905d52436799f10e5781f56d2e2628703a63#egg=zope.configuration
zope.event==4.6
zope.i18nmessageid==5.1.1
zope.interface==5.5.2
zope.schema==6.2.1

name: zope.configuration
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - ca-certificates=2025.2.25=h06a4308_0
  - certifi=2021.5.30=py36h06a4308_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.3=he6710b0_2
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - ncurses=6.4=h6a678d5_0
  - openssl=1.1.1w=h7f8727e_0
  - pip=21.2.2=py36h06a4308_0
  - python=3.6.13=h12debd9_1
  - readline=8.2=h5eee18b_0
  - setuptools=58.0.4=py36h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - wheel=0.37.1=pyhd3eb1b0_0
  - xz=5.6.4=h5eee18b_1
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - alabaster==0.7.13
      - attrs==22.2.0
      - babel==2.11.0
      - charset-normalizer==2.0.12
      - coverage==6.2
      - docutils==0.18.1
      - idna==3.10
      - imagesize==1.4.1
      - importlib-metadata==4.8.3
      - iniconfig==1.1.1
      - jinja2==3.0.3
      - markupsafe==2.0.1
      - packaging==21.3
      - pluggy==1.0.0
      - py==1.11.0
      - pygments==2.14.0
      - pyparsing==3.1.4
      - pytest==7.0.1
      - pytz==2025.2
      - repoze-sphinx-autointerface==1.0.0
      - requests==2.27.1
      - six==1.17.0
      - snowballstemmer==2.2.0
      - sphinx==5.3.0
      - sphinxcontrib-applehelp==1.0.2
      - sphinxcontrib-devhelp==1.0.2
      - sphinxcontrib-htmlhelp==2.0.0
      - sphinxcontrib-jsmath==1.0.1
      - sphinxcontrib-qthelp==1.0.3
      - sphinxcontrib-serializinghtml==1.1.5
      - tomli==1.2.3
      - typing-extensions==4.1.1
      - urllib3==1.26.20
      - zipp==3.6.0
      - zope-event==4.6
      - zope-i18nmessageid==5.1.1
      - zope-interface==5.5.2
      - zope-schema==6.2.1
prefix: /opt/conda/envs/zope.configuration

src/zope/configuration/tests/test_fields.py::GlobalObjectTests::test_fromUnicode_w_resolve_dots
src/zope/configuration/tests/test_fields.py::GlobalObjectTests::test__validate_w_value_type src/zope/configuration/tests/test_fields.py::GlobalObjectTests::test__validate_wo_value_type src/zope/configuration/tests/test_fields.py::GlobalObjectTests::test_class_conforms_to_IFromUnicode src/zope/configuration/tests/test_fields.py::GlobalObjectTests::test_fromUnicode_rejects_slash src/zope/configuration/tests/test_fields.py::GlobalObjectTests::test_fromUnicode_w_resolve_but_validation_fails src/zope/configuration/tests/test_fields.py::GlobalObjectTests::test_fromUnicode_w_resolve_fails src/zope/configuration/tests/test_fields.py::GlobalObjectTests::test_fromUnicode_w_resolve_success src/zope/configuration/tests/test_fields.py::GlobalObjectTests::test_fromUnicode_w_star_and_extra_ws src/zope/configuration/tests/test_fields.py::GlobalObjectTests::test_instance_conforms_to_IFromUnicode src/zope/configuration/tests/test_fields.py::GlobalInterfaceTests::test_class_conforms_to_IFromUnicode src/zope/configuration/tests/test_fields.py::GlobalInterfaceTests::test_ctor src/zope/configuration/tests/test_fields.py::GlobalInterfaceTests::test_instance_conforms_to_IFromUnicode src/zope/configuration/tests/test_fields.py::TokensTests::test_class_conforms_to_IFromUnicode src/zope/configuration/tests/test_fields.py::TokensTests::test_fromUnicode_empty src/zope/configuration/tests/test_fields.py::TokensTests::test_fromUnicode_invalid src/zope/configuration/tests/test_fields.py::TokensTests::test_fromUnicode_strips_ws src/zope/configuration/tests/test_fields.py::TokensTests::test_instance_conforms_to_IFromUnicode src/zope/configuration/tests/test_fields.py::PathTests::test_class_conforms_to_IFromUnicode src/zope/configuration/tests/test_fields.py::PathTests::test_fromUnicode_absolute src/zope/configuration/tests/test_fields.py::PathTests::test_fromUnicode_relative src/zope/configuration/tests/test_fields.py::PathTests::test_instance_conforms_to_IFromUnicode src/zope/configuration/tests/test_fields.py::BoolTests::test_class_conforms_to_IFromUnicode src/zope/configuration/tests/test_fields.py::BoolTests::test_fromUnicode_w_false_values src/zope/configuration/tests/test_fields.py::BoolTests::test_fromUnicode_w_invalid src/zope/configuration/tests/test_fields.py::BoolTests::test_fromUnicode_w_true_values src/zope/configuration/tests/test_fields.py::BoolTests::test_instance_conforms_to_IFromUnicode src/zope/configuration/tests/test_fields.py::MessageIDTests::test_class_conforms_to_IFromUnicode src/zope/configuration/tests/test_fields.py::MessageIDTests::test_domain_decodes_bytes src/zope/configuration/tests/test_fields.py::MessageIDTests::test_instance_conforms_to_IFromUnicode src/zope/configuration/tests/test_fields.py::MessageIDTests::test_w_empty_id src/zope/configuration/tests/test_fields.py::MessageIDTests::test_w_id_and_default src/zope/configuration/tests/test_fields.py::MessageIDTests::test_wo_domain src/zope/configuration/tests/test_fields.py::test_suite
src/zope/configuration/fields.py CHANGES.rst
src/zope/configuration/fields.py CHANGES.rst