I just upgraded a box to 9 and at the same time switched from
lprng to cups.

The box had a printer with an alias. Unfortunaltely it turned out
after a while the the alias for the printer did no longer work.
Moreover, when trying to add the alias I could not find an
appropriate option in the new redhat-config-printer. Hence I
tried to add a new queue with the "alias name" and point it
to the other one. However, this did not work since it told
me that the name is already used as an alias. Checking local.adl
reveald that the alias is indeedstill present in the file.

So, why does it no longer handle aliases?

Moreover, if there is a technical reason for this, redhat-switch-printer
should

2) Warn about this problem when switching print systems
3) Remove the alias from local.adl