First off, don't post the same thing in two different places. As soon as someone can answer it, they will. Second, don't post custom client problems in Bugs. The bugs forum is for official issues only. If you're using a modded client, take it up with the modder and change back to the standard client until it can be resolved. if you're having problems with the standard client, too, then feel free to post the error you get in Bugs. (Moved your second post in Bugs to here.)
From looking at your second image... I'd say device driver issues, at least that's the problem I've seen with this before. I won't rule out another issue, though. Until you can get a more exact answer, make sure you're running 64-bit drivers and 64-bit Java in Windows if you're using an integrated Intel GPU. If you have an Nvidia GPU, the issue may be more with driver settings causing OpenGL to default to the Intel GPU. See here:
viewtopic.php?f=47&t=44629this may be an Ender specific problem and you'll need to wait for an answer from someone who can trace the exact issue down.
Opinions expressed in this statement are the authors alone and in no way reflect on the game development values of the actual developers.