The process is not being 'finished' or 'killed' correctly.
If you close MailWasher, does it disapear?
If you close Thunderbird?
After boot, does the problem persist?
Close both TBird and MailWasher--No joy
Stop Avast's On Access Protection --ICON gone
Restart OnAccess Protection followed by starting Mailwasher -- Icon shows, then dissappears
The following two items appear to be repetitive
Restart Thunderbird then expand News.grc.com(click on plus sign th show status of subscribed groups on server), Icon shows and does not go away. At this point I've not attempted to read any messages
Close Thunderbird -- this time Icon dissappears
Also above occurs with the other news.group. Note closing newsgroup without closing T'Bird and the Icon stays.
Getting e-mail works properly Icon shows then dissappears
Rebooted the system and the problem persists.
One other interesting observation: Neither the Mail Shield or Standard Shield counter increments when opening the news group when the icon shows.