I have Mac OS X Lion and Ubuntu 12.04 installed on two separate SSDs with the my Mac OS X data on a HDD. I disabled journaling on the data drive, installed the necessary drivers, and modified the fstab--now the data drive mounts in Ubuntu with read/write access. Further, I've modified my Ubuntu user's uid(502) and gid(20) to match that of the Mac user.

However, I noticed that while some files have the correct permissions in Ubuntu (user:dialout), others are set as 99:99. I can change these to user:dialout from Ubuntu, but any time I create a new file or folder in Mac OS X, the permission is 99:99 in Ubuntu. Is there a way around this without changing permissions every time I want to modify a file from Ubuntu?