We are using Flash FileRerence upload() with a Php backend. We are using code
that's similar to
http://livedocs.adobe.com/flash/8/main/wwhelp/wwhimpl/common/html/wwh...
text=LiveDocs_Parts&file=00002225.html .

 In our 1st version, we noticed that Mac OS X users were not able to upload as
the onComplete event wasn't triggering for them. To handle this, we added a:

 echo "1";
 ob_flush();
 flush();

 in the PHP backend as recommended here:

http://www.abdulqabiz.com/blog/archives/flash_and_actionscript/workar...
.php

 That fixed the issue for most of our Mac users. However, suddenly some Windows
+ IE7.x users have started complaining, and it seems the onComplete is not
firing for them with this change.

 We are pretty much stuck now trying to figure out how to fix this in a
cross-platform way.

 We have searched a lot every where, and really needed to know if someone else
has already figured out how to fix this!

 Please do let us know if you do!

 Thanks,
 Vinod.