I always used reiserfs, but my last two installs I switched to ext3. I had to install a fresh VL6 Deluxe when Flash stopped working in Opera on my original VL6 Deluxe partition. I tried *everything* to fix this, but finally threw in the towel and installed another VL6 Deluxe on a different partition using ext3. Flash is working with Opera on this partition.
I have no evidence that reiserfs had anything to do with this problem, but I figured what the heck? I tried everything else. Maybe it was a file system glitch. When my Turion laptop died and I set up my old Toshiba laptop with VL6 Light, I used ext3 on it. I haven't noticed any performance differences.