I have promised on several occasions that I will make a post on my blog as soon as an update to VSTO 2005 SE runtime becomes available. Unfortunately when this finally happened I was on vacation and could not immediately post this. My appologies for such bad timing.
Now it is the time to make amends. Please install the new runtime from here if you are still waiting for the fixes to couple of nagging problems like the bug when VSTO add-ins being disabled if Outlook is started in head-less mode (e.g. through automation).
As a result of the above upgrade the VSTO2005 SE Windows Installer deployment article has been also updated with the following changes.
The deployment article is available in the usual place