Page title module fallback problem I'm using the Page Title module to set the &lt;title&gt; tags on nodes, etc.
I'm using the [current-page:page-title] token in my patterns.

According to the manual, this should let me write a custom page title on node level.


  This allows some nodes to 'inherit' the title from the node title and other nodes have the option to override the [page-title] token.
  [...] in this case, the author could override the node title and provide a separate page title [...]. Note that this field does not allow the admin to completely override the Page Title, but just the [page-title] token, which will be inserted as normal into the Pattern for that node type.


And the manual also says:


  So, basically, if you use the [page-title] (or [current-page:page-title] in Drupal 7) token in the patterns/template settings, it will take it's value in the following order:
  
  
  the value of the "Page Title" field.
  the Entity Title (eg, Node Title, User Name or Term Name), if Page
  Title field has no value (in 1).
  the value of the title returned by Drupal's "get title" system (i.e. a fallback). This is usually defined by the Menu API system.
  


However, when the pattern is set to [current-page:page-title] and I do NOT write anything in the Page Title feed on node level. Then the node gets no title at all. It doesn't fall back to the pattern: It simply doesn't get any title.

Have I misunderstood anything?
You need to choose a specific token context from those available such as [current-page-what?]:

[current-page-number]   The page number of the current page when viewing     paged lists.
[current-page-path] The URL alias of the current page.
[current-page-path-raw] The URL alias of the current page. Warning: Token value contains raw user input.
[current-page-title]    The title of the current page.
[current-page-url]  The URL of the current page.


You should specify your fallback global page titles under '/admin/settings/page-title' and for specific node types, such as 'story' 'page' or 'blog' for example. 

You should input the page title tokens as follows;

Example 1:  [current-page-path] [page-title]
Example 2:  [page-title] | [site-name]
Example 3:  [page-title] | [site-slogan] - mysite.com


Note that you can insert symbols or text between the tokens or after.  In this case we've inserted the vertical bar '|' and a hyphen '-' plus the site name 'mysite.com' within the pattern.

I think you've understood correctly.

Although the example above relates to Drupal6, I've tried to recreate your problem in Drupal7 and can't because the default [current-page:page-title] | [site:name] always kicks in, as it should.

Have you tried completely removing the Page-Title module, running Cron, updating the database and installing the module again?