seriously considering leaving Canon

[Sebastian]

The USM settings give, 300, 0.3, 0, are great (albeit a little strong) for WEB POSTING. USM, sharpening in general, has to be done with the output method in mind. What works for web/monitor display will NOT work for print. Another View's settings are much better for full-res files intended for print output.

I personally use a preset of 150, 0.3, 0 for all my web posting, and I start at 125, 1, 0 for all my prints and tweak to suit the image.

That being said, the D100 was notorious for backfocusing when it came out. I owned three and not a single one exhibited it. I now have two 10Ds which don't have focusing issues, yet I know people that had nothing but problems with theirs. I think that if the manufacturer, any manufacturer, wants to fix it, give them the chance.

[jorgemonkey]

You should still be able to send in the camera to Canon to get it fixed. I went to send in my Nikon D70 and I couldn't find the reciept. All I had to do was bring in the card that was used to make the purchase, and the store called Nikon, who confirmed that I was the original owner, and it went it to get checked out no problems.