Q: Any bad upgrade experiences?

[D. R. Evans]

I learn slowly, but I do sometimes learn.

I tried both the last two Kubuntu upgrades (dapper -> edgy; edgy -> feisty)
and both times I ended up having to do an install from scratch in order to
recover from the mess that resulted. In both cases, I realised (too late)
that there were a non-negligible number of people experiencing problems
with both upgrades. (And, to be fair, eventually I think workarounds were
posted, but much too late for them to be helpful to me.)

So this time I'll ask here first: are there any horror stories I should
know about before trying the upgrade path this time?

No need to respond if everything went as it should; I assume that for the
vast majority of people everything will have worked correctly.

It will be marvellous if there are no further posts in this thread :-)