553243 - Links dosn't shown/ work furthermore depending on Styledefinition

Status: RESOLVED INCOMPLETE

(Core :: CSS Parsing and Computation, defect)

Description

[Thiemo Paulus]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2) Gecko/20100115 Firefox/3.6
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2) Gecko/20100115 Firefox/3.6

since Firefox 3.6/ 3.7a4pre doesn’t work the links behind our tab elements within the websites furthermore (Ex. see: http://www.festo.com/cms/de_de/2384.htm or http://www.festo.com/cms/de_de/628.htm). 

We have try to analyse our CSS Files from the website. However it’s not possible to reproduce this failure with a simple CSS Statement. 

We found 2 possibilities, which have an influence to this behavior. What we know, if we change the value of the css statement "display" or if we remove the value after in the section ".clearfix: after" within our initial.css

.clearfix:after
{
    content: ".";
    display: block; 
    height: 0;
    clear: both;
    font-size: 1px;
    visibility: hidden; 
}

or in the second css File  "content.css" Section 7 display: inline;

div.tab-cards ul.tabs
{
    display:inline;
    position: relative;
    top:2px;    
    z-index: 2;
}

the links on the tabs runs well again. However the rest of the site looks than bad.

I don’t know if it’s really be a bug of firefox 3.6 and newer. However this both version are the only one who have this bug. All other competition browser (IE, Chrome, Safari, Opera, FF 3.5.7) works well.

Thanks a lot
Regards
Thiemo


Reproducible: Always

Steps to Reproduce:
1. Goto http://www.festo.com/cms/de_de/2384.htm or http://www.festo.com/cms/de_de/628.htm)
2. Try to click a tab Basisdaten | Elektrik | Pneumatik
3. There is no link behind this tabs (only FF 3.6 and newer!)


Expected Results:  
works like in 3.5.7 or older

Comment 1

[Ria Klaassen (not reading all bugmail)]

Confirmed with Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.3a4pre) Gecko/20100316 Minefield/3.7a4pre

Only a few pixels on top of the tabs are link-sensible.
And it is a regression from 3.5, true.

Comment 2

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

Does the regression range match when bug 238072 landed?

When that happened, we started supporting display:block generated content on display:inline elements.  That change was to match an equivalent change in the spec, which used to say that such generated content would be forcibly changed to display:inline, but now allows it to really be display:block.

Was this site depending on the display:block being forcibly changed to display:inline?

Comment 3

[David Baron :dbaron: (⌚️UTC-5, no longer working on Mozilla)]

(In reply to comment #2)
> Does the regression range match when bug 238072 landed?

In other words, from http://hg.mozilla.org/mozilla-central/pushloghtml?changeset=a159ad4bdb90 , between the 2008-08-17 and 2008-08-18 nightly builds on mozilla-central?

Hmmm.  That sounds like it's probably too old and would have been in 3.5, though I'm not sure of that off the top of my head.

Maybe it was related to a more recent frame construction change?

Comment 4

[Matt]

Is there a reason for stating confirmed but not confirming the bug or is it just being forgetful?

Regression range:

works:
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2a1pre) Gecko/20090305 Minefield/3.2a1pre
http://hg.mozilla.org/mozilla-central/rev/5e81fbdd55e4

broken:
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2a1pre) Gecko/20090306 Minefield/3.2a1pre
http://hg.mozilla.org/mozilla-central/rev/3270fd0db0f0

http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=5e81fbdd55e4&tochange=3270fd0db0f0

Comment 5

[Matt]

Your website seems to work correctly now.  Did you find a work around?  Is there still a page with the issue?

Comment 6

[Thiemo Paulus]

(In reply to comment #5)
> Your website seems to work correctly now.  Did you find a work around?  Is
> there still a page with the issue?

We have modified our Stylesheets, because the failure was no longer acceptable from our customers. 
If it's necessary, we can provide the old stylesheets.

Comment 7

[Boris Zbarsky [:bzbarsky]]

Yes, if you can provide a page that shows the problem (ideally as a zip file attached to this bug, but a live link somewhere would be great too), that would be very helpful.

Comment 8

[Boris Zbarsky [:bzbarsky]]

Marking incomplete for the time being... Please reopen if you do attach or link to a testcase that shows the problem.