I have two XP machines as well as my dual-booted (XP Pro SP3/ Windows 7 RC 7100)
laptop - whenever I reboot my Windows 7 system it fails to reconnect the mapped network drives.
XP reconnects them without fail.
The only way I've found round it is to change the workgroup name, change it back and reboot - then it works.
This is VERY ANNOYING and such a basic problem - I've seen the problem all over the internet but no solutions.
Only MS could release an RC with such an obvious bug