Solr search returns words like the search word, but not the search word itself

We recently upgraded from ColdFusion 8 to ColdFusion 10.  Everything works fine except for the text search function. 

We manually re-created a smaller collection of HTML documents, and the index did appear to run.  Most searches seem to work fine, but the longer word "severability" returns "several", "severally", but no "severability".

We also attempted to index a larger collection, which includes PDF documents.  At first, we forgot to include PDF among the document types in the collection.  The index ran, but returned zero hits, although there are indeed HTML documents in the target population.  When we remembers to add in the PDF documents, the indexing process consistently returns "out of memory" errors.

Any help would be appreciated.