User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4b) Gecko/20030411 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4b) Gecko/20030411 loading derstandard.at (an obviously IE-optimized site, but actually one of the top 10 German real-time news sites) and This behaviour is independent of whether pipelining (see Bug 146455) is enabled or not. Reproducible: Always Steps to Reproduce: 1. go to derstandard.at 2. click on any news link in the main window 3. the "Back" button in the Navigation Toolbar or ALT-Left Arrow Actual Results: You'll end up on the page that's in Mozillas history before derstandard.at, the site visited before going to derstandard.at Expected Results: Mozilla should allow Back/Forward navigation within the derstandard.at site. Maybe there's a connection to bugs 146455 and 174322.
Since you kindly pointed out bug 146455 I bet this is a dupe of Bug 138491. This should clear up when either of the above bugs are fixed.
*** This bug has been marked as a duplicate of 166807 ***