I just lost a WU a half dozen time steps from phase 3 due to some fun little cross project contamination of the client_state.xml file.

First S@H thought it was Pirates. Looking in the client_state.xml, it looked like all that was wrong was the project name had changed. So I renamed it, and it looked like all was good until I tried to return the WU and the servers couldn't recognize the project app version, although the c_s.xml had the correct version number.

So I restored the 4 day old backup I made of the c_s.xml file when I edited it to fix the CPDN WU error. Then I reset S@H and Pirates because they now didn't have the WUs they thought they had. (although I didn't have any from Pirates anyway)

All seemed good, but within an hour, all six of the projects I'm attached to thought they were LHC! So I restored the file again, detached from LHC, and reset everything except CPDN because it obviously still had the WU it had before the SNAFU. Then I got thinking that if S@H wouldn't allow me to return a WU, CPDN probably wouldn't either, and I didn't want to risk wasting 100 or so more hours to finish the WU, so I reset CPDN as well.

There are also several posts about this on the LHC and S@H boards. Here are a couple.
http://lhcathome.cern.ch/forum_thread.php?id=392
http://setiweb.ssl.berkeley.edu/forum_thread.php?id=4656

I'm shocked that interaction like this can occur. Surely there should be some safeguards in place to protect projects from each other...

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