I think the main reason why people haven't responded to you is that they're tired of seeing posts like this...I know I am. So no need to be snarky about it.
Yes, if you believe the many of the measurebators out there then there will be a 10D focus issue. Chesty, if you have a problem with your particular 10D, I'm sorry to hear that, but you will be the exception. My 10D is from the 1st batch from Canon, the early 02xx serial numbers, the so called "Bad Batch" my images are tack sharp, did I do a ruler test, no...why...I don't find ruler pics all that appealing...But I do have pics that have made a medium format shooter friend of mine go..."Wow...those are amazing" A friend with a D30 looks wistfully at my flight shots because his D30 doesn't focus as well as my 10D.
If you're interested in the 10D, buy it. Remember it's a mass produced item, 99.99 percent of the time you'll get a perfectly working body, if there's a problem, then either get it exchanged or have Canon fix it. There was this huge kaffufle about the unintended acceleration on the Jeep Grand Cherokee a few years back...everyone made such a fuss, you know what the findings were? The technical term was "Pedal Missapplication"...and at the moment, a lot of the 10D bashers are guilty of "lack of knowledge misapplication". It was like those who bought the 16-35L, point it at their couch in the living room, set it at f2.8 and expect everything from 12" away to infinity to be in focus...well DUH! A lot of the complainers are coming from digital P&S that have the miniscule sensors with the massive DOF. I've seen posters on DPReview ask how to format the CF card because the manual was too thick for him to read.....OMG! If they can't be bothered to find out how to format a CF card, how the heck can you expect them to be a reliable source on how the camera focuses?
sorry for the rant, but hey, I'm the one getting paid for my 10D images...so the less competition out there...all the better for my bank account.
Now, if only the underwater housing for the 10D didn't cost $3000!
My 2 cents.