I can confirm this. I think this is because aptitude wants to be clever and remove unneeded dependencies. If you do a dist-upgrade, this might not work because dependencies have probably changed quite a lot and aptitude can't deal with it properly.
To resolve this problem i would just use apt-get dist-upgrade. It might be a good idea to publish this in the (upgrading-) docs? -- dist-upgrade to edgy cannot resolve conflicts https://launchpad.net/bugs/59856 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
