I suspect that's the culprit
I created a new user - and installed minecraft (user name 'test') - installed forge 781 - and bingo; it's working.
Here's the log, just in case (I doubt you need it - but hey)
At least I know I can play now
And double thumbs up Lex Great work getting this up and going again
You guys are the experts - but it is because I have a space in my user name? I noticed it's doing Dark%20Elf - not Dark Elf. (old computer name from my hacking days SOOOOO long ago...)
I just tried a clean install too.
http://pastebin.com/a1DQCXzj
EDIT: This is the client; the server gives me pretty much the same problem log tho. (And it was a clean install on both client and server).
I download 776-779; 776 and 777 worked - 778 and 779 did not. So now I'm positive it's something with the build. Guess I'll just have to wait until they have a new build up.
It's a fresh install - nothing in there. Tho I didn't try copying the files from the single player....
EDIT: Nope, I didn't think it'd work but it was worth a try. Same problem.
Ok, I give up trying to attach the log; I keep getting "Cannot access attachments upload path!"
Everything goes fine right up until this: I had no problems with .775 (for 1.6.1 - but can't get squat going with 1.6.2 and .779)