CPU overload + checking forever. help!

[stonewall]

Hey everyone!
I'm new using linux, using Mint 14, so please, be very specific at wth should I do.
I'll explain what i've been trough since I started with linux.
I was using Terminal, but it would only download files, 0 upload, even with firewall disabled, also the whole network navigation was set to 0, couldnt enter any website. Quited, installed Deluge, except for being able to upload at extremmely low speed (500b/s), everything was like Transmission. Now i'm at qbittorrent, worked like a charm, nice dl speed, upload speed, everyone happy surfing the wild wild web, some torrents appeared as stalled, then started downloading, then stalled again, no big deal. Suddenly, all of them stopped. No download, no upload, almost all of them changed to stalled, except 3 that I imported, and around 5 that stood as Checking. Waited for a while, and the pc turned so slow, even mouse movements were jumping canyons.
Decided to close the program. It didnt close. Opened Sys Monitor, the use of CPU by qbittorrent was +-90%. Forced to close, and it became the sleeping beauty, except for still using around 70% of CPU, then I shot it, killed and became a zombie (really, appeared state - zombie). I started to laugh, and restarted the computer, and guess which program appeared as non responding?
Ok, fresh start, started linux, everything is working fine, no absurd CPU usage, then opened qbittorrent. 118% of cpu usage. How is that possible? And it doesnt stop there! All the torrents were locked at Checking status, except the 3 I previously imported. Even the finished ones! And stood like that, nothing responding, no movement, no connection, no download or upload, even from the imported torrents. Updated to version 3.0.9 (was using 3.0.5), and its the same, no changes. Right now, for example, I opened the program, still the same, closed, its sleeping, with 84% of CPU usage, floating from 70 to 99. I've already updated all the packages and programs too, and no changes.
Anyone have any idea of what is happening?

[Peter]

You could try compiling qBittorrent with a DEBUG flag and post the log somehow.
Maybe it holds some information about what's happening.

You can easily do this by:

• sudo apt-get build-dep qbittorrent
• apt-get source qbittorrent
• cd qbittorrent
• ./configure --help (this only shows you the options, like the debug one)
• ./configure --prefix=/usr --debug.... (use the correct debug line here!)
• make -j2
• sudo make install

I'm on my laptop now, which is running like a P2 from all this heat. And I can't use Linux either, as the power management is in a catastrophic state there.

[sledgehammer_999]

Which of libtorrent-rasterbar do you have installed?