I've just tried (and failed) to install eight updates:
All of these have:
Installed version: 8.0.4-0ubuntu0.5
Available version: 8.0.4-0ubuntu0.6
The update fails with the following error message:
"libgl1-mesa-dev: Depends: mesa-common-dev-lts-raring but it is not installed
Depends: libgl1-mesa-glx-lts-raring but it is not installed"
(I don't know why there should be a dependency on packages with Raring in their name, since I'm using Precise)
According to Synaptic, libgl1-mesa-dev does indeed have broken dependencies. However, when I try to remove it, I am told that several other applications will have to be removed - some of these being:
This is not an exhaustive list of the applications in the "To be removed" list, but should be enough to make it clear that removing libgl1-mesa-dev would lead to disaster. At the moment, however, VLC and MATE both seem to be working OK, as does an application which depends on ia32-libs.