On one of my computers, Internet Explorer occasionally "forgets" to load CSS and instead displays the page using just the HTML, which resembles Web pages from 1995 in Spry Mosaic...
If I click CTRL+Refresh, I still get the same ugly page.
However, deleting temporary internet files, then reloading the page, has worked the last few times. That would make me think it is a caching issue, but then why doesn't CTRL+Refresh work? Is there anything else I can do?