LeaVerou/HTML5-Progress-polyfill — pull request #6 by zoltan-dulac (2012-01-03 22:30:09+00:00)
Title: Fixed issue with borders around indeterminate progress bars.

A *small* bug appears when a border is applied to the progress bar. If the value of the progress bar is set to zero, the progress bar increases in width slightly, until the value is changed to a non-zero value.

NOTE that I didn't change progress-polyfill.min.js, since I wasn't sure what you used to minify it (I used Google Closure, and it was very different, so I thought I'd ask first).

You can see what I mean here:

http://www.useragentman.com/tmp/progressPolyfill/test1.html

In order to fix this issue, I changed line 161 from:

if(progress.position !== -1) {
progress.style.paddingRight = progress.offsetWidth *
(1-progress.position) + 'px';
}

to this:

if(progress.position !== -1) {
progress.style.paddingRight = progress.clientWidth *
(1-progress.position) + 'px';
}

(Note the change from offsetWidth to clientWidth). When this is
applied, the jump in width doesn't happen anymore, as seen here:

http://www.useragentman.com/tmp/progressPolyfill/test1-fixed.html