Vertical lines in photo

Yesterday I had some troubles with my S2 IS. I tried to take a few picture outside (it was sunny), but the first pictures were way overexposed and blurry... It did so in P and Portrait mode, as well with Macro mode enabled. I rechecked all the settings and functions, turned the mode wheel in case it was "stuck" in Av or M, to no avail... Later I was able to get some pictures that were looking ok, but upon looking at them on the computer, I noticed a kind of "blur", which were caused by vertical lines when zoomed in.

100% crop of the line effect:

I had a G12 do this and it was the sensor.

Gosh. The issue haven't occured since, maybe it's just going slowly... But after 35000 clicks I can say I got a lot from my S2.

Plus one on the sensor!!
try canon refurb if your in the usa maybe Canada has the same deal, great price and a fantastic warranty if you need a new camera.
http://shop.usa.canon.​com …shed-products-information