These were the problems i faced with Ubuntu
My DVD writer SONY DRU810-A dint work & installed failed
Gaim dint work
Apt dint work properly
The solutions are
Had to enable DMA on the DVD+RW.
I used to have probs while installing bcoz the dvd drive stalled half way , and gave me an error msg bad MD5 !
How i solved this was, boot in from the cd rom, and at the first screen, go to the shell ctl+alt+f2 & enable DMA using hdparm -d1 /dev/hdc, now the install & dvd writing works fine using nautilus, Gnome baker segfaults still..
Gaim couldnt connect to any service , The issue is that it doesnt like the server name eg.scs.msg.yahoo.com but we need to give the servers ip add, for this do a nslook up and fill in the ip add instead of the the domain name. MSN still fails , but its not v imp to me. Yahoo & google work fine
I disabled ipv6 , now apt works fine...
Digicam dint work well with gthumb... Installed gtkam and it works perfectly
Took a long time to fig it out, but at last have a stable USABLE ubuntu system..