RegExp inconsistency ?

gistfile1.js

var str="<h2>Blahblah</h2><p>Blahblah Blahblah Blahblah.</p><h2>Blahblah</h2><p style=\"text-align: center;\"> <img alt=\"Blahblah\" src=\"http://www.example.com/images/blah.jpg\" /></p><p>BlahblahBlahblah Blahblah Blahblah.</p><h2>Blahblah</h2><p>Blahblah</p>";
var regExp=new RegExp('<([^>]+)"([^>]*)>','mg');
var pattern='<$1$2>';
while(regExp.test(str))
  str = str.replace(regExp, pattern);
console.log(str);
// outputs
// <h2>Blahblah</h2><p>Blahblah Blahblah Blahblah.</p><h2>Blahblah</h2><p style=text-align: center;> <img alt="Blahblah" src=http://www.example.com/images/blah.jpg /></p><p>BlahblahBlahblah Blahblah Blahblah.</p><h2>Blahblah</h2><p>Blahblah</p>
// Notice the " in the img alt attribute

var str="<h2>Blahblah</h2><p>Blahblah Blahblah Blahblah.</p><h2>Blahblah</h2><p style=\"text-align: center;\"> <img alt=\"Blahblah\" src=\"http://www.example.com/images/blah.jpg\" /></p><p>BlahblahBlahblah Blahblah Blahblah.</p><h2>Blahblah</h2><p>Blahblah</p>";
var regExp=new RegExp('<([^>]+)"([^>]*)>','mg');
var pattern='<$1$2>';
while(regExp.test(str))
  str = str.replace(regExp, pattern);
str = str.replace(regExp, pattern); // Executing the same regExp without testing before
str = str.replace(regExp, pattern); // Executing the same regExp without testing before
console.log(str);
// outputs
// <h2>Blahblah</h2><p>Blahblah Blahblah Blahblah.</p><h2>Blahblah</h2><p style=text-align: center;> <img alt=Blahblah src=http://www.example.com/images/blah.jpg /></p><p>BlahblahBlahblah Blahblah Blahblah.</p><h2>Blahblah</h2><p>Blahblah</p>
// Nor more " while the Regular expression hasn't changed

// What is the difference between RegExp.test() and String.replace() ??

Submitted a bug to Chromium project http://code.google.com/p/chromium/issues/detail?id=173668

https://bugzilla.mozilla.org/show_bug.cgi?id=837154

It seems it's a normal behavior thanks to the mozilla issue reply. Did a blog post about that : http://www.insertafter.com/articles-subtilites_de_regexp.html