All mounted volumes erased installing Xcode 4 under Lion
I installed Lion, then installed Xcode 4. I did this TWICE (fool that I am). The first time I lost my entire system disk. The second time I lost my entire system disk, my Time Machine backup on a Time Capsule, and a hundred Gbytes of photos and other media on my ReadyNAS raid box. I had no clue that such a bug was even possible. Today I found the same issue that occurred with Snow Leopard, occurring from last March to last June:
All mounted volumes erased when system...: Apple Support Communities
Oh, My God! I had no clue I could endanger storage in other machines on my network just by installing an app on my iMac. This is my first time here, so I haven't yet discoverred how to report bugs, but PLEASE, don't let this go by. This has cost me 10 days of work and untold heartache. Thank heaven I didn't have more volumes mounted before the install.
iMac, Mac OS X (10.7.2), Installing latest Xcode 4.2