Jeez, luck is not on my side

A while ago I got a hankering for a wider angle lens than my sigma 28-70. I thought, what the heck, I mothballed my kit 18-55 that came with my Rebel XT, what the heck a soft wide shot is better than no shot at all, right? Well I pulled it out and threw it on the camera and what do you know? It fails to autofocus. I'm a few months out of warranty but seriously haven't used the lens in at least a half year. Oh well, crap lens, I can live without it.

Today my Sigma 28-70 is showing problems. The focus ring is stiff to turn and it''s interfering with the autofocus motors. I took a quick look for my lens box, receipt, warranty card, etc. Can't find em. I assume I registered the lens online. I just emailed Sigma about this lens. Lets cross our fingers that this puppy is still under warranty.