Well Stephen, what a coincidence! Mine was broken quite some times, tried to fix it at Sigma's rep, but it seems like they never fixed it perfectly (the apperture blades is still jumpy, so the result is quite terrible :( ), and couple of months ago, it stuck at almost f/32. Tried to fix it again, but I have to wait for the parts until 3 months, so I took back the lens and try to fixed it myself, and found out that I can't LOL! But I managed to get the lever moved to full open. Not a good option, but at least it's working.... Got to wait for some months more to actually get it fixed though :(
Yes Lori, started again LOL (Lately I'm taking portraits and some weddings, so I'm kinda out of the midnight shoot stock....). But I'll get some more midnight shoot :)