but only the first three seem to work. I´ve looked through many other items, that might affect the result, like
the ZIP file type, folders, all files & folders etc., but can´t find no explanation. What could i have overlooked?
{zip:compcrc} and {zip:compratio} are for items within zips, not for zips archives as a whole, so I wouldn't expect them to work.
The others should work as far as I know.
It might be worth removing {zip:compcrc} and {zip:compratio} in case they are causing a problem. Failing that, stuff like checking that if you put some text (e.g. "Hello") into the infotip then it does appear; if it doesn't it means you must be editing the wrong filetype/group.