I recently ran into a problem with Internet Explorer 6 where the view source option suddenly stopped working. At first I thought it was a quirk related to applying the latest IE security patch but after a bit of googling I found that this is a known bug in IE. Apparently when the cache gets very large the view source option stops working.
Clearing the Temporary Internet Files made the problem go away.
Limiting your cache to an amount less than 80 mb will also solve the problem, and prevent the need for any future cache-wipes.
Another annoying bug concerning “view source” in IE: if you have a shortcut to Notepad on your desktop and Notepad set as your default source viewer, you won’t be able to view source. Just FYI.
Cool. I thought I was going nuts! Nice to know.