Waiter! There's a bug in my blog!

Since last night, every time I type in the blog's subject line or tagline, the letters change to unrecognizable characters after I press the space bar. Last night I thought it was because the right-shift key was stuck, but it kept doing that. If I type the subject line or tagline in the blog's message body and then cut and paste them, it's fine. But typing in the subject or taglines currently doesn't work. Odd.