I've recently purchased a usb stick which I will be using to share data between me and my colleagues.
I'd like to format it as ext3, but I know this will cause trouble because for instance Mac OS X has troubles mounting that.
The problem is that any other FS I've used before (except for ext2 or ext4) seems to screw up the executable bit on files that have been on it.
E.g. I put up a normal non-executable pdf file on the stick, I take it off again and suddenly it's executable (e.i. the executable permission is enabled).
I don't like these kinds of trickeries. What filesystem should I use? Or is this problem not FS-related?