custom upload directories
Well, after leaving the problem and coming back to it, I was surprised to find it working. I'm not sure what happened, but it's uploading properly now. These are the upload directories that worked:
Craig, I've had the same flash uploader problems you've experienced. That is, I cannot use the flash uploader when on Firefox (I get a message asking me to disable it).
I think that I found the origin.
There seems to be a problem with Check Referer (Security Settings).
If I desactivate (unchecked checkbox), the files are again uploaded.
Apparently, uploadify does not like much the function Check Referer.
The latest firefox doesn't work with even older versions of the flash uploader. We're working on a fix.
If you're getting this issue, try disabling this setting as Djulia suggests:
Check Referer [ ] Warn on external referers/links and require internal referer to submit data to CMS.
And if it still doesn't work, post back and let me know what error you're still getting.