[g-i] Graphical installer and PPC systems
Reading reports about the PPC version of the g-i, it came to my mind an
old, yet unsolved, bug  that caused crashes on PPC boxes with some
particular grapic cards installed.
No one ever investigated deeply enough to state if that was related to
DFB 0.9.22 or to the DFB backend contained in GTKDFB 2.0.9 as, AFAIK, no
one ever tried to run a recent DFB backend togheter with DFB >=0.9.24 on
a PPC box.
As some PPC users may experience annoying crashes, i suggest to disable
DFB's hardware acceleration by default, at least until we switch to a
newer stack of GTKDFB+Cairo+DFB libraries.