More info and direct links here:
http://www.pocketpcthoughts.com/inde...n=expand,42197
Friendly advice: remember to connect your PDA directly to the USB port (not via a hub) and temporarily disable your anti-virus AND your firewall when upgrading or there is a higher possibility to stumble on flashing problems.
Update: Dell removed the update from their HTML site (for now), but the files are still on their FTP site and freely available:
X50v VGA:
ftp://ftp.us.dell.com/utility/R106214.EXE
X50 QVGA:
ftp://ftp.us.dell.com/utility/R106213.EXE