Problems with Musescore for Mac

I've been using Musescore 0.9.5 for a few weeks, and overall it's a nice product that I'm pretty happy with. I realize it's an early build, but wondered if anyone isaware of some major issues. The most noticeable is that my saved files keep getting corrupted. I'll work on a file, but once I've closed the program and try to reopen the program and file again later there's nothing on the staff sheet, or it won't open the file at all. I've also noticed that I always have to do "save as" and overwrite the original file when I'm working. If it try to just "save," it says that it can't write to a TEMP directory. There are a number of other issues, but these are the showstoppers for me. I hope development continues as I've enjoyed the interface. Are there any current solutions for this?