Doesn't find uncompression utilities

[Puppu Tuppu]

Doesn't open most comics archives. Going to help->system information it complains I don't have the non-free unrar, I don't have zip, etc. although the packages are installed (and commands work from the command line)

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: qcomicbook 0.7.2-1
ProcVersionSignature: Ubuntu 3.0.0-9.14-generic 3.0.3
Uname: Linux 3.0.0-9-generic i686
Architecture: i386
Date: Thu Aug 25 23:26:39 2011
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: qcomicbook
UpgradeStatus: Upgraded to oneiric on 2011-08-24 (1 days ago)