I can't quite believe it - it seems that Xara has no file locking of any sort, so if one user is editing a file, another user can also access it and make changes. Whoever saves last, wins! And there are no warnings that changes may be overwritten.

This makes it very difficult for me to recommend Xara to our company for graphics.

Does anybody have a fix for this?

It also surprises me that Xara support doesn't seem to think it's the job of the application to do this and that some other desktop software should handle it!