Thanks for the tip Chris. I've read the chapter, and i´ve got the idea behind those conflict messages. For now, my site is still in development, and i don´t see many of these messages, but at least now i know what's happening. Thanks Gil Chris McDonough wrote:
This is actually normal Zope behavior. It logs an INFO message to let you know there was a conflict but it doesn't mean there is an error. If your site has unacceptable performance and you see a lot of these messages, you may want to investigate. "Investigating" means learning lots of stuff you probably don't want to know right now, but when you're ready, read the Zope Developer's Guide Persistence chapter at http://www.zope.org/Documentation/ZDG/Persistence.stx and then review your code for simultaneous updates to the same object(s).