I'm running Windows 7 64-bit and had recently upgraded to pgAdmin v1.22.0.
It seems though that quite frequently when I run a long-running query,
pgAdmin freezes.
Also if for example I restart my PostgreSQL service while I am connected,
pgAdmin crashes.
I've since been forced to downgrade back to pgAdmin 1.20.
My husband has the same issue on his computer, though could be how we have
our setups configured in a similar way.
I did talk to someone else who said when she was running the PostGIS
shp2pgsql-gui plugin on v1.22.0 it would crash (windows 7 32-bit),
so she reverted too back to v1.20 and problem went away.
Thanks,
Regina