javascript not working in Firefox

Working on a page with lots of ajax and javascript and it just stopped working. Nothing worked, not even alerts. Eventually I went to close firefox and open it again, and when I did it told me there was a firefox process still running and I had to close it before starting FF again, so I went into the task manager and did and it worked fine from then on.

What happened was I had had an infinite loop in my javascript code while working on it, and it seems that kept running away in the background and stopping ff running any more javascript.

Outlook Express images in IE cache

Was testing a mailout today, and checked it in Outlook Express, which was showing an image from a test I sent yesterday. In the end I had to clear out the Internet Explorer cache to get the image to update. Very odd behaviour.