I am having the same problem with OE6 as of about a week ago, and also am unable to find info on this. I use Windows XP with service pack 3 and a Dell desktop. I checked the Microsoft website in the knowledge base and forums, no luck.
Other problems include having to click on a toolbar function 5 or 6 times to get the menu to appear for more than half a second. I opened one of my pics in My Pictures, then tried to use the "next" arrow, but it skipped the next pic and chose the one after. It does that around half the time.
I often read the Comcast Community Forums, and recently several members there reported a virus had been found in the forums. I have the ESET antivirus program, but it turned up nothing with 2 scans (I scanned all areas).