If I disable the truetype useflag and compile rxvt-unicode with gcc-4.5 and -O2 or -O3, it will be totally broken. It starts up but it doesn't draw properly, nor does it handle any input. With -O1 one can work with it, but it still has drawing issues. This didn't happen with gcc-4.4. I created a new ebuild that always passes --enable-xft to configure, which seems to fix the problem.
Created attachment 232459 [details] paludis --info x11-terms/rxvt-unicode
Same issue with rxvt-unicode-9.09
This should be fixed in 9.10, according to the changelog and my testing, could you verify please?
According to my testing, it works with gcc-4.5.1, rxvt-unicode-9.10 and USE=-truetype, so this looks like it was fixed.
Works here as well. Sorry for the late answer. I think this can be closed now.