Tried UNR 10.10 RC on my eee 1000HE and unity was pretty much unusable, switched to gnome (and xfce) and everything was fine, so yes, the issue probably lies with unity/mutter.
Tried UNR 10.10 RC on my eee 1000HE and unity was pretty much unusable, switched to gnome (and xfce) and everything was fine, so yes, the issue probably lies with unity/mutter.