Perhaps this is just my problem, but I thought I'd share. Recently I've noticed a consistent grammar mistake creeping into my work: I'm mis-using "their-they're" (possibly "there" too but I haven't noticed that one). Almost constantly misusing them, now, so that I have to remember to check my work every time I write them.
Now, this isn't a case of "I don't know any better" because I do. I'm quite clear on the rule. Yet, when I type, they come out wrong. I'd like to blame it on the influence of poor grammar from the web and forums like this one, though I suspect that's a lazy excuse.
Anyone else ever find themselves making silly mistakes like this?

Now, this isn't a case of "I don't know any better" because I do. I'm quite clear on the rule. Yet, when I type, they come out wrong. I'd like to blame it on the influence of poor grammar from the web and forums like this one, though I suspect that's a lazy excuse.
Anyone else ever find themselves making silly mistakes like this?