RSI, Feedback, etc
I, too, have suffered from RSI (tendonitis), typically on my left arm, across the back of the hand and wrist. I have a large frame with wide shoulders, and getting my hands onto the keyboard would cause me to have outward angles at my wrists, which caused the problems.
By switching to a Kinesis keyboard, which has a wide footprint and keeps the two hands further apart, I've been able to acheive a nearly straight line from my shoulder to finger-tips, and this alone has alleviated all of my tendonitis pains.
I've also suffered from lower back pain and have gone through physical therapy to find relief. While not labelled MLT, I was given daily excercises which consisted of purely laying on the ground, face-down, and propping myself up on my elbows. In that position, I can definite feel the tension in my back, as my muscles are tied up (feedback!). By concentrating I can feel each muscle in my back relaxing and untying, letting my body droop even more.
I've learned that if you have an injury from doing something repetitive (ie, typing, sitting in an office chair for 16-hours-a-day), then repetitive excercises are *not* the answer. Relieving the tied-up tension is the answer. Previously, I was told to do wrist-curls with a 5lb hammar to cure my wrists; only made them worse. Told to stand up and then repeatly touch my toes and reach for the sky to cure my back; only made it worse.
The cure for these activity-strained ailments is... effortlessness! You got hurt by working; you won't get cured by working more. Only by learning to move and sit without effort will make you better.
Forget the chiropractors, and go find yourself a good physical therapist. If they claim they have 'low impact' methods, they are probably the right ones. If they jerk your joints around, or have you do repetitive activities, run run away.
Enterprise Grade Software
Then again, there's some software that guarantees that it will function exactly as its documented. In the case of a particular enterprise object-database, if an API didn't function as documented (ie, had a bug) you would have cause to demand action to be taken.
If you're buying a $49 piece of consumer software, you're not going to get much guarantees. $10,000 for something, with 20% maintenance, and you'll see warrantees, etc.