Recently, I ran across an IE6 issue relating to jQuery and select options. The error message from IE6 was “Could not set the selected property. Unspecified error.“, which appears to be related to a timing issue with the DOM.

Here’s the original code, which worked for IE7 and IE8:

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The jQuery team recently released version 1.4 of their widely popular JavaScript library. This release includes significant performance improvements.

Many of the most popular and commonly used jQuery methods have seen a significant rewrite in jQuery 1.4. When analyzing the code base we found that we were able to make some significant performance [...]