159880 - Vertical rounding errors in stacked block boxes

Status: NEW

(Core :: Layout: Block and Inline, defect)

Description

[Big John]

When the container for a set of block boxes is given a 'line-height' using a 
relative unit, and a value other than unity (say like 100%), vertical 1px 
errors may appear between the stacked block boxes. The link is a demo of this 
behavior. IE and Opera do not display this bug. 

Moz will also show similar horizontal errors within a row of floated boxes 
using percentages. This seems to be the same as reported in Bugzilla Bug 125560.

Comment 1

[Mark Annand]

Attachment: screenshot of elusive gap between divs

Shows funny behaviour when positioning two divs that should be touching -
occasionally a 1 pixel gap separates them.

Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.1a) Gecko/20020611

Comment 2

[Mark Annand]

Comment 1 concerned an attachment of Mozilla's behaviour with:

http://www.bathspa.ac.uk/igf/default.htm

Using Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.1a) Gecko/20020611

In this case line height doesn't seem to be involved, but some of the pages on
this site exhibit this and others don't. This is seen using Mozilla on other
Windows versions too. Whatever's throwing this is very persistant - doesn't fall
to various tweaks of the stylesheet.

Oh and apologies if it's my CSS/HTML.

Thanks

Comment 3

[Chris Casciano]

Cofirming & ALL/ALL based off 1.3b OS X.

Note... this may be a dupe of Bug 63336... I'm seeing lots of inconsistancies in
that bug as to whether we're using dupes or depencies. 

Comment 4

[Boris Zbarsky [:bzbarsky]]

Is the problem still reproducible at
http://users.rraz.net/mc_on_the_rocks/testpage/mozshift.html ?  If so, what are
the steps to reproduce?  If not, is there a testcase that shows the problem?

Comment 5

[Chris Casciano]

page has moved...

old location: http://users.rraz.net/mc_on_the_rocks/testpage/mozshift.html
new location seems to be: http://www.positioniseverything.net/mozshift.html

and yes... the problem is readily reproducable on osx 2003042708... but may
required a text zoom in or out to see... screen shot linked off demo page

Comment 6

[Boris Zbarsky [:bzbarsky]]

.