I've had a lot of issues with FileDen lately. A sudden spurt in traffic has caused me to run out of bandwidth for the mp3 downloads in a matter of 2 weeks, when it used to take at least a month. Being unable to upgrade my file host (I had the most expensive account they had), I've decided to quit throwing money on a shitty service and go the free route for now.
Though you would normally right-click + save the mp3 files for download, now you gotta left-click the link and download through MediaFire's website directly. Kind of a pain in the ass, I know, but it's better than our previous issue of not being able to download at all!
So far, there hasn't been an assload of advertisements infiltrating my computer screen like you would find at ZShare, so I think I'll stick with this host for awhile...