Can no longer write to USB stick when formatted as FAT/FAT32

I had about 2GB worth of mixed content on an 8GB stick, which I use daily on my Mac (OS X 10.6.2) and at work (XP).
I copied all the files off it onto a folder on my Mac so I could use it to transfer some big files to my mum's laptop (Windows 7).
Having finished the job, I formatted the stick in OS X as FAT, but when I tried to copy my files back, I got an Error Code -36 when writing one of them. I tried formatting the stick in Windows 7 as FAT32, and got the exact same problem.
I then formatted it as Mac OS Extended in OS X (after doing a Verify & Repair), and this time the files all copied across to it perfectly. However when I plug the stick into Windows 7 now, it doesn't show up.
I tried formatting as FAT again in OS X, but again the files won't copy and give an Error Code -36
Any ideas?
Thanks

markmc78 wrote:
I formatted the stick in OS X as FAT, but when I tried to copy my files back, I got an Error Code -36 when writing one of them.
Two things to try: (1) On your Mac in Disk Utility, verify that the "Partition Map Scheme" of the USB drive is set to "Master Boot Record". If it's not, repartition the drive to have that scheme. (2) Format that USB drive in Windows.

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