Hello. I have laptop with Intel 945GM video card. It was working well with mesa-13, but after it upgrades to 17 opening one of three tabs ("Icons", "Startup and Shutdown", "Display and Monitor") in System Settings menu always cause crash. There is no any errors in dmesg and Xorg.0.log. I'm trying to start Crash Reporting Assistant, but "Fetching the Backtrace" step shows nothing, button "Reload" doesn't change anything (The debugger has quit unexpectedly / The crash information could not be generated).
What can I do to define the problem?

ps Downgrading to mesa-13 is not a variant, because it's already removed from Portage (Gentoo Linux Package Manager).