Sorry for showing up late to this party. Monkeys do have to sleep.
It sounds like you are having a very similar problem that I had a week ago. No matter what browser you use, the problem persists. That to me tells me that you have a damaged [cct] file. [cct] files are "Cast" files used in macromedia Director.
What we need to do is locate these files and delete them. Don't worry, when vmk loads the next time, it downloads the new and fresh ones automatically.
On my computer my .cct files are located in:
C:\Documents and Settings\Kurt\Local Settings\Temp
The "Kurt" part is my username, so yours should be different. You need to go to this directory and look for any files that end with .cct and delete them. [Example file: mp0.cct]
Another way of accomplishing this is to Click on Start, Search, Files and Folders and search for files like *.cct . (Make sure you include hidden files and folders in your search) You can delete them from the results screen.
This will almost definitely solve your problem.
Additionally, it seems that you responded to a thread and told a user (correctly) to clear her cookies and temporary internet files. My problem (exactly like yours) happened almost immediately after I did this. Quite odd I say. Could you by any chance have cleared your temporary internet files right before this problem started? I'm trying to track this issue down, repeat it, and let VMK know about it.