Big ones ? Verify the size limit in the admin panel / php.ini
Or specific type of images? (like TIFF, ...).
If the type of the file is not in the regex, the upload fail.
I had to add theses types to upload OpenDocument and MsOffice formats (I didn't test Ms Office docs) :
application\/vnd\.oasis\.opendocument\.*
application\/vnd\.openxmlformats-officedocument\.wordprocessingml\.document
My size limit is 65535KB.
First regex is :
(video\/(3gpp|mp4|mpeg|quicktime|webm))|(audio\/(aiff|midi|mpeg|mp4))|(image\/(gif|jpeg|png))|(application\/(x-(7z|rar)-compressed|zip|arj|x-(bzip2|gzip|lha|stuffit|tar)|pdf))
But the problem seems to be in "moveUploadedFileToTemp".
