My workaround with special PPAs works now!
After the last round of upgrades to the special PPAs of inkscape and xorg, the problem seems to have disappeared - I can click into workspace without crashing Inkscape
inkscape-trunk: Installed: 1:0.48+devel+11922+32~quantal1
xserver-xorg-core: Installed: 2:1.13.0.901+git20121123+server-1.13-branch.c0e68f8e-0ubuntu0ricotz~quantal
Please let me know if you need further testing/info
My workaround with special PPAs works now!
After the last round of upgrades to the special PPAs of inkscape and xorg, the problem seems to have disappeared - I can click into workspace without crashing Inkscape
inkscape-trunk: devel+11922+ 32~quantal1
Installed: 1:0.48+
xserver-xorg-core: 0.901+git201211 23+server- 1.13-branch. c0e68f8e- 0ubuntu0ricotz~ quantal
Installed: 2:1.13.
Please let me know if you need further testing/info