I don't like Kuroo that much...
Today I did an emerge --sync and an emerge portage and started it for the first time.
The only thing I have emerged since the last install of sabayon was mplayerplug-in (didn't use Kuroo, just the terminal) and I unmerged Mozilla-Firefox because I prefer the binary from Mozilla (but didn't use Kuroo for this, just the terminal)
Started the 'updated portage' for the first time, so it was his first run on this installation:
!!! Problem resolving dependencies for x11-drivers/nvidia-drivers<br>!!! All ebuilds that could satisfy ">=x11-libs/libdrm-2.2" have been masked.<br>!!! One of the following masked packages is required to complete your request:<br>Needs a new Murrina GTK Theme<br>!!! Depgraph creation failed.<br>
Getting tired of Kuroo, it always tells me about some problem, I think it's better to do : emerge --unmerge Kuroo !