421544 - Navigating with failed link confused Firefox on current page state

Status: RESOLVED DUPLICATE of bug 421067

(Firefox :: General, defect)

Description

[Lie Ryan]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9b3pre) Gecko/2008020204 Minefield/3.0b3pre
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9b3pre) Gecko/2008020204 Minefield/3.0b3pre

I'm using Firefox 3 Nightly Build, and I'm noticing that if Firefox recently got confused on it's navigation state if it fails to load the page (caused by other unrelated factors, such as the fragile LAN port got plugged out). 

First Scenario:
Background story: I visits pages in this order: A, B, C and page C failed to load, and an error screen (Page Not Found) shows up. If I pressed "Try Again" it would brought me to page B (CORRECT BEHAVIOR: brought me to page C). If then I pressed back button, it'd brought me to page B (CORRECT BEHAVIOR: Actually this is already correct IF I wasn't already in page B, but since I was already in page B, I should go back to A if I pressed back again)

Second Scenario:

Background story: I visits pages in this order: Z, A, B, C and page C failed to load, and an error screen (Page Not Found) shows up. If I pressed "BACK" button it would brought me to page A (CORRECT BEHAVIOR: brought me to page B). If then I pressed back button, it'd brought me to page A (CORRECT BEHAVIOR: Actually this is already correct IF I wasn't already in page A, but since I was already in page A, I should go back to Z if I pressed back again)

I'm guessing that the failed page messed up something with firefox's pointer on which page to display next but it doesn't touch firefox's pointer on what's the REAL page to display.

The odd thing though, every time I tried to reproduce it, the bug mysteriously hides itself (and no, I'm not double clicking the back button and I'm not clicking the back button before clicking the try again button). But the bug shows up again and again on my normal browsing.

I'm classifying this as major bug solely because Back button is one of the most important part of navigation, but since I'm quite new to this I don't know exactly how bugs should be classified, and I might be wrong, if you feel so, please override the classification.

Reproducible: Couldn't Reproduce

Steps to Reproduce:
Steps to Reproduce:
1. Navigate a series a page until you met a failed page (or emulate one by unplugging your Internet, or turning off Wifi, or whatever you need to do)
2. Plug back the internet
3. Press Try Again or Back
..
..
5. Press back again
Actual Results:  
Actual Result: 
4. Lands on a wrong page
..
..
6. Lands on the same page as 4.

Expected Results:  
Expected Result:
Well, bit difficult to explain, because the problem itself is a bit difficult to explain.