[mirrorbrain] mirrorbrain on debian jessie, can't connect to db.

I'm trying to set up mirrorbrain on Debian jessie. unfortunately I'm 
getting the following in my error log.

[Sun Oct 18 13:40:41.813108 2015] [dbd:error] [pid 5301:tid 
140353868875520] (20014)Internal error: AH00633: failed to initialise
[Sun Oct 18 13:40:41.813115 2015] [mirrorbrain:error] [pid 5301:tid 
140353868875520] [client 188.222.72.217:35783] [mod_mirrorbrain] Error 
acquiring database connection, referer: 
http://mirrordirector-mb.raspbian.org/raspbian/pool/main/0/0ad-data/

Any idea how to go about debugging this?

I'm able to use the "mb" command line tools, libaprutil1-dbd-pgsql is 
installed and i'm able to connect to the db manually with "psql -h 
127.0.0.1 -U mirrorbrain mirrorbrain"

my dbd.conf is

<IfModule mod_dbd.c>
     DBDriver pgsql
     DBDParams 'host=127.0.0.1 user=mirrorbrain password=<censored> 
dbname=mirrorbrain connect_timeout=15'
</IfModule>



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