So, jQuery doesn't support the earlier version of IE6.0 SP1???
No, and that will not change. We have a hard enough time getting the still-supported IE6 SP3 to behave. Microsoft has dropped support for the platforms where IE6 SP1 is the latest available one. We do not prioritize requests based on the number of punctuation marks they contain.
I see your problem, but understand ours. Microsoft's IE6 SP1 is a commercial product that your customers paid for a decade ago, but it is no longer supported by Microsoft and no source code is available. jQuery is provided free of charge, mostly supported by volunteers, and the source code is there if you want to find and fix the issue with IE6 SP1 for yourself and your customers who are using unsupported software.