I just had this problem, found this thread, then fixed the problem (I think), so I thought I'd share.
Here was what happened:
Installed Pidgin 2.6.1 with the Aspell English spellchecker.
Attempted to run it. It immediately crashed.
Uninstalled Pidgin. Did not uninstall Aspell.
Reinstalled Pidgin. Attempted to run it. It immediately crashed.
Frowned at computer. Googled. Found this thread.
Installed Revo, ran it and uninstalled Pidgin. Since that had already been tried by somebody else on this thread, I also uninstalled Aspell through Revo.
Reinstalled Pidgin without the Aspell English spellchecker.
Ran it. It opened, which is a lot more than it did before.