Good lesson, brother. I've developed a font-paranoia that serves me really well.
I just used a nice, blocky font last week and caught a criss-cross goof just like your W. I had to get my glasses and look over the whole thing and I found another itty bitty one that probably wouldn't have caused a problem.
I use a lot of my words over and over in different projects and dig them back out of old files. It took me half an hour yesterday to find a signature, just so I didn't have to do it all over again.