Wikipedia won't load; everything else appears fine

I'm using the latest version of Safari, 5.0.1, and Wikipedia - all of a sudden - fails to load at all. Pages come up totally blank. So far, this is the only website that fails. If I go into another user account on the same computer and use Safari, Wikipedia loads fine.

I tried emptying the cache, but it made no difference.

Any suggestions? Anyone else had the same (curious) issue?