Comment 7 for bug 472408

I can't reproduce the drawing issue with metacity --replace either. I haven't yet tried it under KDE 4 with desktop effects enabled.

I did, however, try compiling the latest R from source. It required libxt-dev (which I got from the 9.10 repositories), but it had the same problem under compiz. I'm not terribly familiar with the underlying workings of the R code, but the xt library is pretty low-level for X11 programming. I googled briefly for bugs with compiz and libxt, but only turned up some old Java bugs. There's obviously still more work to be done to figure out if it's a general Compiz problem, something specific to the Ubuntu build of Compiz (or libxt/X11), or something bug within R which only affects this particular setup.