SWFUpload works in IE, but not in Firefox

Question

Using SWFUpload v2.2, Firefox 3, IE 8, Flash 10 In my ASP.NET application all uploads are being processed by upload.aspx (I have the correct upload_url set in the settings o

Answer 1

I found the answer ... finally. I was struggling with this for a very long time. Can't believe this is the answer. The reason is SUBST.

I have a computer with SSD drive and since it is 256GB only I decided not to partition it. However I like split between C and D partitions and I emulated it on my SSD drive via subst command. If I pickup the file from the drive which is created with subst command, the swf upload doesn't work. I almost can't believe that, but it is a fact I finally discovered today being unable to upload files on my development computer only.