Hi, I have experienced this problem several times already. When executing a long query on one database, and trying to connect to another database at the same time, pgAdmin application hangs and never returns. Server status (monitored by another instance of the pgAdmin) for the database, where the long query was running shows that the query is not running any longer, but all the open windows of the current pgAdmin application are showing status (Not Responding) and do not redraw.
I am using pgAdmin 1.8.0 Beta 1 (Jul 13 2007, rev: 6423) for Windows. With best regards, -- Valentine Gogichashvili