Does KT work on fat32 and how stable is it ?

I can answer that it writes to FAT32, even if not installed on it, with no issues, whatsoever.

I had a Linux partition on an external drive, and a partition of FAT32 shared between the Linux and Windows machines. Never had an issue writing to or reading with KTorrent.

Once I figured out NTFS sharing, got rid of the FAT32, but read/write with KTorrent (2.1.4) was stable.

That's nice but can developers tell something about this ..?

You can't install Linux onto FAT32 anyway, so that's pretty much a non-issue. FAT32 in itself deals poorly with fragmentation and large files, and that's a limit of the filesystem, not the torrenting client...

NTFS write with ntfs-3g will get you a lot better performance and of course largefile support, but there's nothing wrong with using FAT32 for torrents either. It works.

The idea is both having windows and linux ( windows 98 - my favourite for old games.. ) and i want to share a harddisk between linux and windows

Which is exactly what I noted above.

You can share a FAT32, and in particular, KTorrent will give you no issues.

Isn't this what you're talking about: I had a Linux partition on an external drive, and a partition of FAT32 shared between the Linux and Windows machines. Never had an issue writing to or reading with KTorrent.

Yes but i want to hear developer's opinion because months ago i had fat32 partition and a lot of troubles with it .. so i formated it in ext3.

Reading and writing to a file system is done by the kernel, doubt its even an issue for the client. If your fat32 had problems you'd need to report them to the Linux kernel devs.