You need to unmount your drive before you take it out. If you don't the buffer to which is written isn't emptied. (Buffer is used because of the short lifespans of thumbdrives).
If you're using kde, you can right click on the icon on the desktop and select unmount or eject. Gnome, I don't know.
Terminal command: umount /dev/sda1 but sda1 can be different...
Search the forum for the linksys wlan adapter, it has come up here very often.
Registered Linux user number 389291
Laptop: Nec Versa p550, Pentium M 1.86GHz, 1024MB ram, x300, 80 GB HD, bluetooth, 2915BG Wlan card
Desktop: Amd Athlon x2 4200+, 2GB ram, Geforce 7300GT 512MB silent, 160GB HD in a nice centurion 534 case :cool: