Firefox (Gecko) cutting upper part of some text lines

[Damiano Dallatana]

Binary package hint: firefox-3.0

A few days ago some strange rendering errors started appearing casually on Firefox and all Gecko browsers I have installed (FF 3.5, Epiphany - not on Midori [Webkit]). I am using FF 3.0.10 on Ubuntu 9.04 with it-IT environment and amd64 arch.

I attach two screenshots of the main page of the www.apache.org website: note the title "The Apache Software Foundation" cut in the upper part (but also "Latest News" has the same problem). It seems that removing the "line-height: 1;" property for these texts solves the problem.

The same problem happens with the Ubuntu website, but seems to be a rendering problem (scrolling the page makes the problem appear on other lines -.-) and the bug disappears when trying to get a screenshot.

[I am using opensource ati driver on AMD Radeon X1250 (RS690) integrated chipset]

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
Package: firefox-3.0 3.0.10+nobinonly-0ubuntu0.9.04.1
ProcEnviron:
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: firefox-3.0
Uname: Linux 2.6.28-12-generic x86_64

[Micah Gersten (micahg)]

Thank you for reporting this to Ubuntu. I cannot reproduce this in either the latest daily Firefox 3.5 build or Firefox 3.0.11. Could you please try upgrading to Firefox 3.0.11 and see if that solved your issue?

[Damiano Dallatana (damidalla)]

I am using 3.0.11 now, and the problem is still here.

In particular:
* the title of the Apache website ("The Apache Software Foundation") is always cut in the upper half (problem of borders/paddings/margins?) - in FF 3 (even in safe mode), in Epiphany, etc.
* the text cut in other lines and other websites seems to be a rendering problem: it is usually (not always) a problem linked to scrolling the page. That problem disappears if I give focus to another window (or if I give focus to FF if it was not on top), but only for the lines I can see: if I scroll up/down, some lines are cut.

I am at your complete disposal for any information I could give. Thanks for your work :)

[Micah Gersten (micahg)]

Thank you, could you please try in a new profile. You seem to have a lot of extensions installed and sometimes they can conflict. You do not need to delete your old profile to test.
firefox -ProfileManager

[Damiano Dallatana (damidalla)]

Ok, solved, it was linked to an "Helvetica" font I did install (using a low-quality ttf, I think). A lot of sites ask fot Helvetica, so it was used, and meant many problems (the system did consider it as lower than it was - so, low text background, low selected text,...).
Thank you very much indeed!
Marking as Invalid, as it's not a FF bug at all.