patrik: i dont have any of theese problems and i have owned a mediator for 2 years now.
but i can say that once i got my usb2.0 card (spider) then i had to reseat all cards to get a boot at all.
anyway its a hack so i suggest all users to check their cards every now and then to see if they are connected properly at all times , heat makes them move and heat is the only thing there is enough of in the mediator amiga's.
also remeber to firmly attach the cpu slot hack (a1200) , this one is infact the one making most problems for people.