We have had the same problem with "saving" Versions on zope 2.2.2 + ZEO. Our ZSS servers are on linux and our Zope Clients are on NT (don't ask).
I have all ZSS and ZCS on NT but I isolated the possible zeo's related problem running my Data.fs on a standalone zope and the problems persisted.
The only solution that worked for us so far is to repeatedly modify the locked object and re-save the version. If it doesn't work at first try again after a few hours. Eventually (after a dozen or so tries) it seems to sort itself out. We haven't seen documents become folders yet, but most of the work was done in ZClasses.
I solved the problem with some packs to the Database. In no understandable way after one of the packs the discard and save worked okay. In one of the packs I got this output: ERROR(200) ZODB FS FS21 ERROR: Bad reference to ('\000\000\000\000\000\010kQ','myversion') ERROR(200) ZODB FS FS21 ERROR: Bad reference to ('\000\000\000\000\000\010]\250','myversion') Its obviously there was something wrong with myversion object, but only after some more packs the save/discard worked okay. But I quit versions because the locking of a folder when you add objects is not a good feature of versions, specially if the one locked is root, means you just loose the possibility of changing your online "version" of your site like adding new objects, and changing locked ones. I know this versionlock happened with CatalogAware objects from experience with zope 2.1.6 but for instance the locking of a document even for a change out of the version is something never happened in 2.1.6. I'm just seeing this in 222, maybe this is a result of those objects being in a locked folder. Best Regards, Júlio Silva _____________________________________________________________________________________ Get more from the Web. FREE MSN Explorer download : http://explorer.msn.com