I have a page that uses SWFUpload. It lets the user select multiple files, then it puts those files in a queue and uploads them. After each one is uploaded, a callback fires that makes an AJAX request to the server for filename of the picture as it now exists on the server (obviously, it gets moved and renamed). That url is assigned to the .src attribute of a new image, and then when the image is loaded it gets displayed in sort of an "Uploaded Images" div. My problem is that about one time in three, the AJAX request will return with a blank response. Firebug indicates that no request has even been submitted.
My theory is that maybe I'm running into the HTTP/1.1 two-connections- per-client limit, but I don't honestly know. For the record, the server is extremely reliable generally -- I wrote a quick script to submit an identical request once per second and let it run for five minutes, and out of 300 AJAX requests there wasn't a single one that came back empty. Also, it's definitely not a server-side scripting problem, since I experience this problem even when I replace the script with a static page. Any ideas on what might be causing the problem or how to fix it? Thanks, Andrew
