Thanks, droppyale! Disabling acronym wrap worked for me as well. If I enable it, my site prints out the following warning:
Warning: preg_replace() [function.preg-replace]: Compilation failed: support for \P, \p, and \X has not been compiled at offset 163 in /[…]/wp-content/plugins/wp-typography/php-typography/php-typography.php on line 1909
I hope that is of some help in the bug hunt.