Another bug that I've not seen before that caused some confusion. Actually, the bug almost makes sense, except that it leaves IE6 and IE7 completely hanging.

In redesigning my business web site: Left Logic I came across a particularly frustrating bug that took me a good deal of time to find the source of. Since I couldn't find any info out it on the Internet, I thought it would be worth posting. IE, both IE6 and IE7, in the following example, [...]

First let me say this took me ages to work out how this was going wrong, and that this bug affects both IE6 and IE7. IE is treating the name attribute on forms as the ID attribute, causing the getElementById to return very unexpected results.