No matter what I try but trying to the contents of a 14MB-zipfile (or tarfile) results upon unpacking that it says "Error uploading package file" "Error: Invalid file title specified"
There are approx. 55 files in the zipfile and maxuploadfiles has been set to 100.
Also I had to modify the post_max_size in php.ini as this value is being used instead of upload_max_size.
Doesn't matter if I run this under Firefox or Chrome.