I ran Phex 2.0.0.76 on Mandrake 10.0 without problems, then upgraded to 2.1.4.80 unstable after doing a clean Mandrake 10.1 install (/home partition left untouched).
Now Phex still downloads normally, and files in temp folder have the correct size, but the "completed" files are all 16.384bytes.
Any suggestions?

I doubt it's due to a faulty /etc/fstab, considering the temp files, but just in case, here's the partition Phex downloads to:
/dev/hda6 /big vfat umask=0,iocharset=iso8859-1,codepage=850 0 0

Restarting Phex, as well as removing the completed download, has no effect.