I have tried several times to upload files to my blog and attach files to GMail emails. Each time, the file says "uploading" however the process never completes. Do you have any suggestions on what might be causing this? I have tried this in both Internet Explorer 8 and Firefox. The computer is running XP Pro.
Are you sure you are waiting long enough? Please remember that your upload speed is probably a fraction of your download speed.
I suggest creating a small text file on your machine, making a new email to yourself and trying to attach that text file. If it fails after a few minutes, there is clearly a problem (first thing I would advise is disabling ALL addons, no matter how handy / nice they sound). If it does work, you just need to wait longer.