Sorry, should have added that the other link (the one above it in the screenshot) is working normally.
Using current version of Thunderbird 3.1.7 to pull the email.
Can't test with Outlook/Outlook Express, not installed here.
The next reply I get, I'll pull the email with a mailserver, so it captures the raw message and header, disable AVG and go back to Thunderbird (and see what happens).
Thanks for the suggestion though
How very odd.
1. Disabled AVG Email Scanner.
2. Pulled "watched email" in T'Bird.
No double dots!! So why only the second link in the screenshot is affected I've no idea!?
Update: Appears to have self-corrected here on latest test.
AVG email scanner: back on
Mail client: Thunderbird 3.1.7
All links within the notification email are followable.
Happy days