User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040207 Firefox/0.8 Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040207 Firefox/0.8 When I scroll the web page e.g. with the mouse wheel (smooth scrolling doesn't matter), the display seems to shift by one pixel which causes one or more text line to be vertically too short and the letters look mutilated. One pixel line is missing simply. When the browser window loses focus the display is restored and everything looks fine. Reproducible: Always Steps to Reproduce: 1. Load a long web page full of text, e.g. a long Wikipedia article 2. Scroll with arrow keys or mouse wheel I experience this with gtk and KDE 3.1.

Same problem sometimes appears on MandrakeLinux 9.1/9.2 + Firefox 0.8/0.9/0.9.1 under Gnome 2.4 and KDE 3.1. It seems to happen randomly, I can't reproduce. Text comes back normally when selecting the text, or switching to another tab and the switching back or switching to another app and then back to Firefox.

showing two missing pixel lines in text lines

I'd like to add that the same error *may* be responsible for the URL address line jumping when clinking on it in order to enter another URL.

Workaround : turn [Display resolution] in Edit/Preferences/Font and colors to 96 dpi. This seem to work for me and other linuxfr.org users too.

(In reply to comment #4) > Workaround : turn [Display resolution] in Edit/Preferences/Font and colors to 96 > dpi. This seem to work for me and other linuxfr.org users too. This workaround does not work here. I searched bugzilla and I think this is a dupe of this longstanding bug: #152671 Unfortunately it seems that nobody has worked on this bug since 2 years. Christian

For me the workaround worked, too. But I had to restart Firefox.

I don't meet this problem anymore. "Display resolution" defaults to "system settings". Works fine on Mandrakelinux 10.0/10.1, CentOS 3.3 (RedHat EL 3), RedHat EL 4beta1 with Firefox 0.10.1 / 20041021 Nightly Build. Anyone can reproduce ? Close bug ?

Well, a thorough investigation showed that there are dozens(sic!) of bugs related to this. You may close it or not, I don't think it's significant in any respect. ;-) By the way, it's a duplicate anyway. Have a look at bug 134942 (for example ;-).

WFM on Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b2) Gecko/20050524 Firefox/1.0+

Sorry for bugspam

This bug should be closed, it is fixed.

I see this bug with Firefox 1.0.7. On Slackware 10.2 w/ KDE 3.4. Scrolling using the scroll bars produces the bug in quantity. So I don't think it's fixed, unless you mean in 1.5RC3, which I haven't tried yet. The bug appears when "display resolution" is at "system setting"; does not occur when "display resolution" is 96.

I have same bug with Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.5) Gecko/20060626 Firefox/1.5.0.5 (Debian-1.5.dfsg+1.5.0.5-1). I tried to play with "Display resolution". If I set 96 dpi, bug disappeared, but fonts are bigger, so this is not a good solution. If I set manual value (106 dpi) which correspond to my display, bug is still there (same result with "System setting"). Moreover, this bug is here only if "smooth scrolling" is enabled, and if I use pageup/down to scroll fast on page. Up/down arrows with smooth scrolling are ok, no display bug. So today this bug is not fixed!