McAfee SiteAdvisor destroys Google Notebook items

Today I recognized that McAfee SiteAdvisor is starting to destroy Google Notebook items when they contain (valid) links:

The space below the text is not removable and after some attempts Firefox says that I should stop a not responding script and after that Google Notebook says it is not possible to save the note. Also the “changes” made by SiteAdvisor cannot be made undone.

D’oh!