I think you were looking for ≠ (option + =, or some awful ALT + four-digit number on Windows).![]()
The problem is that software makers are using a convention that involves numbers and decimal points / periods -- whether they intend for it to be considered as a decimal number or not. If software makers used commas (10,4,10), dashes (10-4-10), or some other character, it wouldn't have the same alternate connotation. Sure, using two decimal points indicates that it's not meant to be taken as a literal decimal number, but that doesn't eliminate the fact that the digit immediately to the right of a decimal point is taken to have the same precision as the digit immediately to the right of another decimal point, regardless of what other digits might be present to the right of that digit.
On the other hand, Apple could have placed the updates another digit out, inserting a zero before the first nine updates (10.4.08, 10.4.09, 10.4.10), staying more consistent with decimal notation but allowing for more than ten updates. (Of course, had Leopard been out this Spring, we might not have seen a 10.4.10.) At least we haven't gone for the zaniness of Firefox (version 2.0.0.4 anyone? looks more like an IP address than a software version).
Of course they may not be decimal points at all... Maybe they are periods...