Syndication error in SP05

Hi,

After we upgraded to SP05 patch01 hotfix 1 (5.5.41.70), all of our syndication processes don't work any more. The syndicator generates invalid XML files. It seems that syndicator crashes when processing fields that are mapped to remote keys. We have been trying many different things but cannot find the fix. Does anyone else have the same problem? Is this a new bug?

Any help is greatly appreciated!

Regards,

Kenny