Imported From: http://groups.google.com/group/in-portal-bugs/browse_thread/thread/aedd0394de197ff9#
I was testing out 5.2.0-RC1 release recently and found, that no upload can
be made on Front-End.
For example on a link submission page select an image and try to upload it.
Error "Can't save file" will be displayed, but "/system/images/" folder is
writable and I've checked it twice.
...