I have been having problems with the various bugs for about 7 hours now.
So I got tired and called a friend and asked for a simple fix.

So step by step:
1. Go to your Games folder.
2. Find Diablo 2 and click launch.
3. Come back next week when they fixed the Fraking servers.

Remember kids.
These are the people that thought a solid skill tree was too complicated.
They need the time... Because they are special.