@ZippyV I work in the Medical Industry creating applications for data entry. (That is why this issue frustrates me so. If these hidden bugs get to our production version then it can impact a patient's care (very bad day for everyone).)
You are looking at the situation in the wrong way.
Your target market doesn't even come close to what Hitslink displays. They are 2 different environments. The marketshare of Window XP might be a lot higher or lower with your customers.
If there are bugs affecting your applications then you didn't test enough or the bugs don't affect your software.
You seem to forget that a new version can introduce new bugs.