Seems like everyone and their cat has a reason to complain about O'Reilly these days:
Someone just pegged my bogometer today lamenting that O'Reilly should have an upgrade program to help out customers who purchased an earlier edition of, say The Perl Cookbook.
I have my issues with O'Reilly, but all of them are bikeshed-grade details. Whenever one of those bikesheds gets a little irksome, I mention it to the O'Reilly staff who either say "that's a great idea, we should do that", point out the many other factors they need to keep balanced as a profitable business, or chime in that other customers have similar complains (and they're already in the process of addressing the issue).
O'Reilly's relationship with their customers is beyond reproach. And I'm tired of hearing people gripe about them.
Update: 2003-09-05 Although I meant to list these gripes rhetorically, gnat has kindly addressed the complaints listed above. Thanks, gnat!