Also have Mavericks and Lion and Mountain Lion.
Testing right now to see where my wallet.dat file is stored locally. Do the folks that have seen this issue use the Filevault service? Are you encrypting the entire drive or a portion of the drive?
Likely also HFS+ Compression could increase some issues with wallet.dat corruption.
If anyone has had this issue please do the following:
Can you guys with the issue please run this on a terminal and paste the output here?
diskutil list
Please describe which disk and partition that the db / bitcoin-qt supporting files is on as well - trying to track down a bigger picture issue.
(Posted to github as well)
Additionally most folks have had this corruption issue with OSX using an SSD disk - and when their system goes to sleep or hibernate. (Again thinking along the lines of resource forks, having a file open but also writing ram to disk etc.) Please check this guide out:
http://sysadmin.flakshack.com/post/9253439680/ssd-tweaks-for-mac-os-x Attempting to disable these has saved me from getting the corruption on my SSD with OSX