stripsplashes doesn't work if the slash is the only character -> creating file in root dir leads to "//filename"

check if element really exists before calling it. (e.g. for public shared files view, elements like "navigation" doesn't exist)

don´t show negative numbers. this is only a quickfix. I still dont get why the Shared folder can be bigger than the root folder. Perhaps a inconsitency in the filecache?

we are sharing the same file again if item_source of the already shared file and the newly shared file is the same. Therefore we can use the same target name