Problem when visiting http://www.handleidinghtml.nl results in an endless refresh loop with Mozilla other browser handle it just fine. The URL is irrelevant to the real problem: Further investigation leads to the following: Apparently Mozilla is numbering the frames incorrectly (meaning, different than other browsers (crosschecked with Netscape 4.78 and Konqueror 2.1)). See the attached files (testcase & testcase-body). It will show three frames. One frame will show the content of the parent.frames array. Compare the result in different browsers. The parent.frames array has frame3 at position 0 in Mozilla, while in other browsers frame1 is stored at that location. Is this due to a different DOM implementation (in that case I think it's not very good, since it differs from most other browsers), or is it a bug in the JavaScript engine?

This is a dom bug. *** This bug has been marked as a duplicate of 101746 ***

Verified Duplicate. vk207@bigfoot.com: Thank you for this report. You have been cc'ed on the other bug so you can follow its progress.