I was working on a project this morning which uses a non-safe web based font and decided to use sIFR 3. For the first time implimenting it, I was impressed and got it looking how I intended in Firefox quickly. It wasn't until I was cross browser testing that I found - oh! the flash isn't loading at all in Internet Explorer. To cut a long story short, a lot of googling and head-meeting-desk bashing, it turns out that even though I had the Flash Player installed in Firefox; I had not installed the Internet Explorer Flash Player. Find it a bit odd that you need to install one player multiple times, but I digress.

Not 2 hours later, we found an issue with some flash that would not work in Opera - the embedded no flash content was appearing instead. Luckily, because of the work I had just done with sIFR, I found that again I had to install the Flash Player for Opera. Hey presto! It fixed the issue.

So in future, if you find that your flash is working perfectly fine in one browser; do not spend hours trying to pick your code apart to fix the problem. Make sure your browser has flash installed. I found this was a handy tool to quickly know if my browser had flash installed.