User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5b) Gecko/20030910 Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5b) Gecko/20030910 Mozilla 1.4.x and Mozilla 1.5b behaves the same in the following respect. Reproducible: Always Steps to Reproduce: 1.install Mozilla with default prefs 2.open e.g. http://www.lindenstraße.de/ 3.switch pref network.enableIDN to true and back to false 4.try again to open the above URL Actual Results: First open works while the site doesn't open the second time. So IDN is active although the pref is set to false Expected Results: It should behave consistently to the pref. Is it time to switch IDN on by default?

modules/libpref/src/init/all.js contains the pref two times: line 592: pref("network.enableIDN", true); line 652: pref("network.enableIDN", false); // Turn on/off IDN (Internationalized Domain Name) resolution Perhaps this is the problem?

the above mentioned URL is www.lindenstra*german_sz_ligatue*e.de. I will open a bugreport for bugzilla that it should be switched to UTF-8 encoding, otherwise noone can write non-ASCII here :-|

fixed by bug 221437 *** This bug has been marked as a duplicate of 221437 ***