The current version of pgadmin in the repositories is 1.12.3 which is tested till postgresql 9.0. The version 1.14.x is compatible with 9.1
The following warning is given whenever pgadmin3 is connected to local postgresql database.
------------------------------------------------------------------------------------------------------------------------------------------------------
Warning:
This version of pgAdmin has only been tested with PostgreSQL version 9.0 and below and may not function correctly with this server. Please upgrade pgAdmin.
------------------------------------------------------------------------------------------------------------------------------------------------------
Release of Ubuntu
Description: Ubuntu oneiric (development branch)
Release: 11.10
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: pgadmin3 1.12.3-1
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu1
Architecture: amd64
Date: Fri Sep 16 17:44:47 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
SourcePackage: pgadmin3
UpgradeStatus: Upgraded to oneiric on 2011-09-08 (7 days ago)
Status changed to 'Confirmed' because the bug affects multiple users.