Signature image is oversized, when I save a post

It's probably a single obscure setting, or line of code, somewhere in the updated page software.

I hate computers, and the people who invented them!

And here's how it looks, if I navigate away from the page and then back again:

That's how it looks in all my posts on this page, and in the other FSM forums, too.  Weird, wild stuff.

OK, I got some screen shots to illustrate.

Here's my signature as it appears on an existing post in a thread in the Ships forum, when I access that post today for the first time:

OK, I need to adjust what I said.  It's when I post to existing threads that this occurs.  When I added this new thread just now, the image in my signature appeared at the normal resolution.