313781 - Renaming *.html to *.asp changes page rendering behavior in pages with stylesheets

Status: RESOLVED WORKSFORME

(Core :: Layout, defect)

Description

[xebra314]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7

On an ASP page I am making, inside a <div>, sometimes text after a </form> is put on a new line (as it should be), and sometimes it is not.  If I spam refresh in the browser window, I can watch it changing back and forth between having a new line and not having a new line, seemingly at random.  (That is, it doesn't always change on refresh, but it will within 10-20 refreshes.)  The HTML source generated by the ASP is *NOT* changing, of this I am 100% certain, FireFox simply changes its mind on how to render the page.  In fact, if I remove all scripts from the source, such that there is only HTML remaining, the problem persists, but only if the source is named *.asp.  If I rename it to *.html, the problem disappears.  Either way, Right Click >> View Source returns char for char identical source.

The problem disappears if I completely remove the <style>...</style> paragraph, but occurs even if <style>...</style> is empty!  Strangely, the problem also disappears if I remove the class="*" statements within the various HTML tags, though it doesn't seem to matter whether the classes referred to exist or not.

Reproducible: Sometimes

Steps to Reproduce:
1. Get the attachment I will upload in a moment.
2. Put it on a server that runs ASP.
3. Look at the page in Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7.

Actual Results:  
Sometimes this:
[Text Box] (Submit Button) Texttexttexttexttexttexttexttext

Sometimes this:
[Text Box] (Submit Button)
Texttexttexttexttexttexttexttexttext

It changes at random when the page is refreshed.

Expected Results:  
Consistent behavior.

Comment 1

[xebra314]

Attachment: Test case that exhibits the behavior for me

Comment 2

[Josh Birnbaum]

Can you try Firefox 1.5 beta?
Can you verify that your server is sending the same HTTP headers in the .asp case as the .html case?

Comment 3

[François Gagné]

You could verify the headers with http://web-sniffer.net/.

Comment 4

[xebra314]

(In reply to comment #2)
> Can you try Firefox 1.5 beta?
> Can you verify that your server is sending the same HTTP headers in the .asp
> case as the .html case?
> 

I don't know, how do I check HTTP headers?  The page is on an internal server so I can't use the web-sniffer application mentioned.  All I can tell you for now is that when I use Firefox to view the source of the page, it's identical whether or not it came from the file with the ASP extension or the file with the HTML extension.

Comment 5

[xebra314]

I just tested this in 1.5 beta 2, it exhibits no erroneous behavior.

Comment 6

[Josh Birnbaum]

Great to hear that it's working in 1.5.  Resolving WFM ('fixed' is only used when a patch is associated with the bug).