What steps will reproduce the problem?

Doesnt happen all of the time, but once every 20 min or so

1. Open Penicl
2. insert widget
3. edit name of widget

What is the expected output? What do you see instead?

renaming the header of a section , the screen locks up and will not let me edit anything.

What version of the product are you using? On what operating system?

1.0 build 6, Windows Vista Business

Please provide any additional information below.

It is happening with our custom widgets, It worked fine before the last update.