Similar to: http://bugs.webkit.org/show_bug.cgi?id=15022 This is the case where you update the style.width property of a col element in he table header. The column is not updated. The new width is ignored.
Created attachment 16191 [details] Complete html example of issue
Confirmed with a local debug build of WebKit r25346 with Safari 3 Public Beta v. 3.0.3 (522.12.1) on Mac OS X 10.4.10 (8R218).
This Bug is still present in Safari 3.2.1 (525.27.1) for Windows and Chrome 0.4.154.25 (Windows). element.offsetWidth is 0, and setting width with element.style.width, element.width is ignored.
*** This bug has been marked as a duplicate of 26523 ***