qBittorrent official forums

The new version xubuntu 11.04 crashes after the splash, how to solve??

Can you start it from terminal and copy the output here?

qbittorrent: symbol lookup error: qbittorrent: undefined symbol: _ZN10libtorrent7sessionC1ERKNS_11fingerprintEii

Hmm.
And by "new", which version do you mean?

You can check the version by typing the following in a terminal:
apt-cache show qbittorrent | grep Version

Version: 2.6.9-2
Version: 2.8.2-1~getdeb2
Version: 2.8.2-0ubuntu1~natty

This kind of symbol lookup error occurs when you have installed libtorrent-rasterbar6 from one repository and qbittorrent from another. For example, I see from your output that you have the getdeb repository set up and in this case this is what causes the problem.

getdeb provides qBittorrent 2.8.2-1~getdeb2 built against libtorrent-rasterbar6 from the official Ubuntu repository.
My PPA provides qBittorrent 2.8.2-0ubuntu1~natty against libtorrent-rasterbar6 from my PPA (more recent than the one in Ubuntu)

Since you have both my PPA and getdeb repo enabled at the same time, the package manager installs:
  * qBittorrent 2.8.2-1~getdeb2 from Getdeb repository because (qBittorrent 2.8.2-1~getdeb2 > qBittorrent 2.8.2-0ubuntu1~natty).
  * libtorrent-rasterbar6 from my PPA because it is more recent than the one in Ubuntu official repo (and Getdeb repo does not provide it).

I hope you understand the problem now. Please disable the getdeb repository and install the qBittorrent package from my PPA instead of the one from getdeb.