For the past two years my user's name does no longer link to my weblog.
//Dashboard -> Users -> Personal Settings -> then scroll down to Account Details. Then scroll down to where it says ‘Website‘ select the URL for your primary wordpress.com blog and then save changes. Then Now every time you sign into the forum we can all click on your username and your blog will be linked to it. //
That's what I did. And yes, I saved the changes.
The link was there at the start of my weblog-run, at one time my user name suddenly went unlinkeable. The name does link at other wordpress-fuelled weblogs, though. It's only on this forum where it doesn't.
I asked advice in this matter more than once and never got a reaction (for being off-topic?), I hope I will this time.