Since the recent software update I find that trying to edit any page with the "Enable enhanced editing toolbar" preference turned on causes IE 8.0 to hang for about 20 seconds and then create a popup message saying: "Out of memory at line: 76" (presumably a javascript error, though the message box doesn't mention that).
This behavior is specific to IE and does not occur with Firefox. However it does occur with both the Monobook and Vector skins. Also, I verified that the problem occurs on several different language Wikipedias.
The problem persists even after clearing my cache.
Version: unspecified
Severity: major