This worked for me!
I have had similar problems and the solution (for me) turned out to be really simple.
On my Vista laptop i couldnt print at all, not directly not via LAN. my XP worked just fine.
This is how i did.
I downloaded the Patch/update from dell at:
http://support.euro.dell.com/support...&catid=&impid=
IMPORTANT! CHOSE VISTA AS YOUR OS EVEN IF YOUR ARE RUNNING XP
Download the patch (really a cleaner of old printer drivers) to remove your printer.
install the VISTA(!) driver (also if you run XP, IT WORKS!) dated 19-06-2007
And install it. during install, you may get an error from windows claiming the scan software was not properly installed. Ignore it.
NOTE: when finished the app search for "installed components", and by me that took about 10-12 minutes. finally it showed up stating it couldn't find a fax software. who cares. I clicked cancel, and hey presto! It worked. (Note: all this is on my XP machine, with the 922 attached.)
Now, on my Vista-machine, i simply did the same thing as before.
THEN i installed again, choosing "install for use on network" and this time it didn't try to get the drivers from the XP n,achine, since they were the same. and then it works.
At least for me.