Picard extremely slow on multiple save

This problem has been noted for a while now across multiple Ubuntu and Picard versions up to the latest Quantal amd64 and current Picard 1.0-1 (same on 1.0+bzr1336-ppa6) and has been experienced on different machines.
During a multiple "Save" operation, Picard can slow down to a crawl, Picard sometimes even freezing up completely for a short while (greyed out). The same operations on the Windows version doesn't affect Picard at all, and the whole applications remains very responsive.
So this is inherent to the Ubuntu version that seems to be badly implemented in this respect.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: picard 1.0-1
Uname: Linux 3.6.0-030600rc7-generic x86_64
ApportVersion: 2.6.1-0ubuntu1
Architecture: amd64
Date: Mon Oct 1 13:25:42 2012
ProcEnviron:
 LANGUAGE=fr_CA:fr
 PATH=(custom, no user)
 LANG=fr_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: picard
UpgradeStatus: No upgrade log present (probably fresh install)