I notive the same problems.
V1.04, 2 Drive 500 Go (configure in normal mode, with Download Schedule active).
I was not able to edit, copy the file ... only delete the file and took and older version copy by the Download Scheduler.
As i said before, if the Download Scheduler can create a LOG file, i will be able to see all error during the copy (because the Lock File were unable to be copy from Drive_1 to Drive_2).
I notice the problems 2 days after (file was locked 20-2-2008 .. i erase it and took backup from 19-2-2008) ...
You now see why i can't trust the RAID ... If the file suddenly being locked, without the download schedule, i loose the file and all the work on it.