Also, I can trivially add an xlibmesa-glu transitional package that depends on libglu1-mesa if that's required.
That is exactly the kind of thing I was hoping for.
Ok, I've just done this. Steve Langasek let me know what I wasn't seeing properly. I really shouldn't respond to bug reports when I'm tired and irritable. The xlibmesa-glu transitional package will be in the next upload of the xorg source package to unstable.
Heh, maybe I should have summarized. Incidentally, I ran into many more dependency problems after switching out xlibmesa-glu for libglu1-mesa. (I got prematurely excited when it looked like apt no longer wanted to remove things.) I tried dist-upgrading using aptitude instead of apt-get and it worked. Apparently aptitude was able to resolve the problems. Results of apt-get dist-upgrade (after replacing xlibmesa-glu with libglu1-mesa): The following packages have unmet dependencies: libgl1-mesa-dev: Depends: mesa-common-dev (= 6.4.1-0.4) but it is not installed Depends: libgl1-mesa-glx (= 6.4.1-0.4) but it is not installed libgl1-mesa-dri: Depends: libgl1-mesa-glx (= 6.4.1-0.4) but it is not installed xserver-xorg-core: Depends: x11-common (>= 1:7.0.0) but 6.9.0.dfsg.1-5 is installed E: Unmet dependencies. Try using -f. Result of using apt-get -f install: The following extra packages will be installed: libgl1-mesa-glx mesa-common-dev x11-common xbase-clients xserver-xorg Suggested packages: x-window-system-core x-window-system mesa-utils libglide2 Recommended packages: xresprobe mdetect discover The following packages will be REMOVED: dosemu dosemu-freedos flashplugin-nonfree gsfonts-x11 kate kdelibs-bin kdelibs4c2a kdvi kghostview kile kmahjongg konsole kpdf kviewshell libkdeedu1 libkdegames1 wine wine-utils xlibmesa-gl xserver-common xutils The following NEW packages will be installed: libgl1-mesa-glx mesa-common-dev The following packages will be upgraded: x11-common xbase-clients xserver-xorg 3 upgraded, 2 newly installed, 21 to remove and 57 not upgraded. 48 not fully installed or removed. Again, aptitude properly resolved these dependencies, and all is working now. Thanks, JDR