i had this bug with xubuntu 9.10, with Radeon 9000 (rv250). the XAA workaround solved it.
now i did a new install of xubuntu 10.04. and it seems this bug is gone.
my config: P4 2.4Ghz, 1Go RAM, Radeon 9000 (rv250), xubuntu 10.04 (free radeon driver).
i had this bug with xubuntu 9.10, with Radeon 9000 (rv250).
the XAA workaround solved it.
now i did a new install of xubuntu 10.04. and it seems this bug is gone.
my config: P4 2.4Ghz, 1Go RAM, Radeon 9000 (rv250), xubuntu 10.04 (free radeon driver).