If one uses IE6 it does not see the same web interface that FireFox does, is this a BUG or a FEATURE?
The impression I've gathered is that Tom doesn't bother doing support for IE6 as it would quadruple his workload without much meaningful gain. So the site is designed for IE7/FF.
Yes, sorry - it's just not worth the effort for 0.6% of the site's users (although admittedly there could be a causal relationship!)