I confirm that closing Outlook 2010 solves the problem. Well spotted!
The freezing time varies between 1s in the morning up to 5s in the end of the day, but the whole performance of PL/SQL Developer degrades as the day progresses, switching between windows is slower and Copy freeze times also increase.

Using version 9.0.6.1655

Last edited by Paulo Santos; 06/05/13 09:05 AM.