My rear tire (Gatorskin) got a small divot - like a cone shaped divot that's about 1/8 inch acrossed and goes to the threads of the tire. The problem is that it tends to pick up debris that normally wouldn't be an issue and I get a flat - esp when it's wet. So yesterday after getting a flat on the way to work i put a boot in (one of the Park adhesive boots that Iv'e been carrying around for years) and rode the rest of the way in.
To double the issue, on the way home I got another flat from a decent sized piece of glass that cut another 1/4 inch gash in the tire. So I used another boot on that to prevent it from picking up debris and causing more flats -- because the gash spreads open when the tire is inflated.
I was too busy to change out the tires last night, so rode it in this morning -- and other than an annoying little "bump bump" from the boots pressing out the shape of the tire (not enought to see, but enough to cause a tiny bump on smooth road surfaces), I had no issues.
Without the cuts and the boots, I'd say there's about 700 miles left on the tire. So would you keep riding it, or swap the front onto the back and put a new front tire on? (I have two or three extras on hand).