If this DistroWatch
article (scroll down) that points to an informal poll is correct, “almost 44% percent of those who attempted
the upgrade process encountered “serious problems” or reported that
their upgrades went “really bad”.” So, I guess, I was in good company
when I had problems upgrading from 6.06 to 6.10.
I think almost 44% is sufficiently large that upgraders should do so
with caution, if at all. Personally, at this point, I think it is wise to
do a clean install, instead. YMMV. Insert disclaimer here.