I just finished a 5.10 to 6.06 upgrade.
Went well I think.
System boots. Gnome looks OK. SSH access OK. Sun's
Java OK.
Did not break Ruby custom stuff, including gem installs (Rails!).
SVN is broke (BDB version mismatch). I will work on that tomorrow, it is late for me. I *did* run a repo dump right before starting the install. I think I know how to fix it.
G.