Well, at first my N9 told me there was an update for cacheme ("cacheme trial") but when i tried to install, that the applicationmanager gave a download error.
I tried a couple of times, all without succes.
After that I removed cacheme from my N9 to ensure there wouldn't be any conflicts between the free version and the trial, but than i couldn't find the trialversion in OVI store at all .
So than i just paid for Cacheme, (i use it quite often and think its worth the money) but that version didnt download either..
After a couple of tries i found a red ! symbol in my application list, removed that, and tried again. That worked.
So i dont know if there was a server error at OVI's side, of my N9 or WLAN screwing up, but I did succesfully install something else between purchasing Cacheme, and beeing able to download it.
Anyway it works now

Edit: like a charm i should add.