Error reindexing attachments in Drupal 7 using Apache Solr Attachments module
So I figured this out in case anybody else runs into this issue.

In the 7.x-1.x version of Apache Solr Attachments, there is a line of code in apachesolr_attachments.index.inc that uses the PHP function mb_detect_encoding.  That command relies on the PHP EXIF extension being installed and it is not by default.  Once I modified my PHP installation to include it, it was able to process the files.  I ran into some other issues though but finally got it all working.  Details are posted here -> http://drupal.org/node/1377416