On Fri January 14 2011 13:04:12 David Hare wrote:
> A smooth upgrade from Debian Lenny to Squeeze+Trinity is probably not
> possible. If you don't purge all kde stuff first kaboom will strike.

We've had successful upgrades by first upgrading to Squeeze, then
adding Trinity, and then removing KDE4.  There are the same few
conflict hiccups as any other route, but the configs seems to come
over just fine.  In Debian at least "kaboom" seems to migrate from
~/.kde to ~/.kde4 without damaging the originals.

--Mike Bird