Ok, here's an update:
I opened up my computer and cleaned it (turned off for a long while, unplugged) using compressed air in a can followed by a specialized fluid for eletronic components (you know, the kind that sprays on and completely evaporates to leave no trace behind)
Well, the thing is, either a plastic clamp thing broke because of the fluid or it was allready broken and the spray just loosened it. Anyway, here's the result
http://farm3.static.flickr.com/2361/...3396e88a_b.jpg
http://farm3.static.flickr.com/2410/...0bff1004_b.jpg
It's hard to notice in the pictures but both the butterfly clamp (in one pic) and the metal support part prominently showing in the center of the pic (in the secod one)are both now completely loose. Is it anything I should worry seriously about? the heat sink below the fan seems to be secure enough, as weel as the fan itself... so exactly what where those pieces holding in place?