I found some problems during installation of wsjt_7.06r1938_i386.deb under Ubuntu 10.10:
$ sudo dpkg --instdir=. -i wsjt_7.06r1938_i386.deb
dpkg: error processing wsjt_7.06r1938_i386.deb (--install):
unable to open file '/var/lib/dpkg/tmp.ci//.svn': Is a directory
Errors were encountered while processing:
This is Ubuntu problem... more about that and solutions you can find here:
and script https://bugs.launchpad.net/aptdaemon/+bug/637489/comments/13
Than I compare wsjt7 -wsjt9 decoding of some mine old wsjt wav files and seems that wsjt9 (Ubuntu 10.10) can not decode some jt65 files.
Samples and decode info you can find in
Files > wsjt_jt65b_samples_wsjt7-wsjt9 folder.
If someone have time will be interesting to try same on Windows PC.