I can confirm this issue on my dual monitor setup as well.
thunderbird: Installed: 3.1.7+build3+nobinonly-0ubuntu0.10.04.1 Candidate: 3.1.7+build3+nobinonly-0ubuntu0.10.04.1 Version table: *** 3.1.7+build3+nobinonly-0ubuntu0.10.04.1 0 500 http://us.archive.ubuntu.com/ubuntu/ lucid-updates/main Packages 500 http://security.ubuntu.com/ubuntu/ lucid-security/main Packages 100 /var/lib/dpkg/status 3.0.4+nobinonly-0ubuntu4 0 500 http://us.archive.ubuntu.com/ubuntu/ lucid/main Packages
I can confirm this issue on my dual monitor setup as well.
thunderbird: nobinonly- 0ubuntu0. 10.04.1 nobinonly- 0ubuntu0. 10.04.1 nobinonly- 0ubuntu0. 10.04.1 0 us.archive. ubuntu. com/ubuntu/ lucid-updates/main Packages security. ubuntu. com/ubuntu/ lucid-security/main Packages dpkg/status -0ubuntu4 0 us.archive. ubuntu. com/ubuntu/ lucid/main Packages
Installed: 3.1.7+build3+
Candidate: 3.1.7+build3+
Version table:
*** 3.1.7+build3+
500 http://
500 http://
100 /var/lib/
3.0.4+nobinonly
500 http://