Imported From: http://groups.google.com/group/in-portal-bugs/browse_thread/thread/4194a4716e58304e#
Flash uploader uses temporary folder to store uploaded files until user hits
Save toolbar button. In that temporary folder files are named like this:
*uploader_flash_<control_number>_<file_number>_<original_file_name>*
This way, when 2 users select same file (same name) for upload on same edit
page, then they are merged together and only one user will be able to use
this file at the end.
I propose to generate temporary name for each uploaded file after file is
uploaded to server (in OnUploadFile event) using "tempnam" php function and
return it to js uploader part. Then, when user hits "Save", then js uploader
will submit original file name and it's temporary name (does that already)
so problem will be eliminated.
Also it may be a good idea to clean up "/system/tmp" folder after upload is
made, so we don't store files, that were uploaded 1 day ago and were never
used since then.
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Best Regards,