So you just upgraded to the new Snow Leopard and everything looks like crap and you can’t read it because all you have are boxes with A’s in them. Well rest easy, cause Apple actually solved this one for you and they let you know too but it just wasn’t a clear explanation.
When you started the computer it said that there was a font conflict and asked if it should ignore the conflict or move one of the files to the trash, well you should have moved it to the trash. Then just logged out and back in. That is it, empty the trash and you are completely done.
If you are having trouble with things like SIMBL and it’s plugins that is a different story, but as a hint: For now SIMBL stuff still works if you run the target application it in 32-Bit mode. Click the *.app file and then press Apple-I to bring up the info box where you can select 32-Bit only.
One last bit of advice is to ensure you upgrade programs like Little Snitch before you run your Snow Leopard Upgrade because it will not run without the upgrade and you will be left without a firewall until you upgrade, so might as well do it before and have it the whole time, or at least do it almost right away when you restart after the upgrade.