Hello,
just to share my experience, I hope it can help, it's only my 2 cents not an "universal truth" :-)
Locales and Postgresql :
I had to run "dpkg-reconfigure locales" and uncheck all "iso-8..."locales BEFORE installing postgresql
since Postgresql only create Db in ISO encoding an not UTF when ISO locales are also selected (it was the case on my machine..)
I keep only UTF-8
(Its seems difficult to change DB encoding after install because you have to create an UTF8 cluster and move your previously ISO encoded DB" in it.)
Even if I "apt-get purge remove purge postgresql"... and reinstall it on UTF locales system, the airtime install goes wrong (???)
This must be made on fresh install (again it's my own experience , not the "holy truth")
apt-get vs aptitude :
When using aptitude postgresql 9.1 and 8.4 were proposed
I've experienced few trouble with that, because of dependecies unsatisfied...
My advice : use apt-get (8.4 only is proposed )
Rabbitmq-server :
When installing Rabbitmq with airtime, the install failed during rabbit start (as i remember)
My advice: install Rabbitmq BEFORE Airtime
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Debian Squeeze
3.2.13-grsec-xxxx-grs-ipv6-64
I3 2x3.4 core / 16Go ram / 1To (raid soft)