Find command

[David Squance]

Are there specific types of fields which do not respond to the find 
command?  I'm looking at a card with a field containing the word I'm 
searching for, and I get 'not found'.  The docs say the find command 
searches all fields which don't have the dontsearch property set to 
true.  It's not my spelling--I've tried a couple of different 
possibilities.  Some find the word and some don't.
Dave