This is an issue with the flash image uploader.
After initial installation, I was able to use the image uploader without any issues. I uploaded two images and it worked perfectly, doing exactly what it was meant to do.
Now it doesn't work. Every time I try to upload an image, the progress bar scrolls through as usual then in red letters above the bar it says "HTTP error". That's all it says. There is also a DISMISS box on the progress bar. The image doesn't upload or anything. This is happening every time.
I don't think this is a site security issue or anything because I was able to use it before without issue. I have changed nothing in the software aside from adding a few plugins, but nothing to do with flash or images at all.
I have check my security and various other settings on my site (I'm a network admin) and everything has the proper permissions, etc.
I can manually upload the files, obviously, and I can use the non-flash-uploader.php script fine as well. I have gone through the sticky about the media uploader and checked everything listed there with no success.
Just wanted to post my error, in case you haven't seen it before.