Fixed in 6.0.4.
Can someone confirm that this fixes unreported (as far as I can tell) issues related to shares? I'm experiencing two bugs. One is "permision denied" when trying to move/copy/whatever an item into a shared folder for the second time (say, the first one was deleted). The second one is an inability to move items between shared folders. e.g. can't move "task A" from "shared task list 1" to "shared task list 2"--when user permissions should allow this--user get's "mail.CANNOT_COPY". If not, I want to get these on bugzilla as soon as possible. Thanks!