User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:5.0) Gecko/20100101 Firefox/5.0 Build ID: 20110622232440 Steps to reproduce: I've attached a HTML file with inline SVG graphic that contains three lines (red, green and blue). All lines have cursor style set to 'crosshair'. I hover along each line. Actual results: Hovering along the red and the green line show the crosshair cursor while the mouse is over the line. Hovering along the blue line causes a flickering between the crosshair cursor and the standard cursor. I have reproduced this behavior with Firefox 5.0 (tested on Linux and Windows) and Firefox 4.0.1 (tested on Windows). It doesn't happen with Firefox 3.5.19.0 and 3.6.18.0 (tested on Windows) as well as with Chrome (tested on Linux). Expected results: While hovering along the blue line the cursor should't change.

Reproduced: Mozilla/5.0 (X11; Linux x86_64; rv:5.0) Gecko/20100101 Firefox/5.0 Mozilla/5.0 (X11; Linux x86_64; rv:8.0a1) Gecko/20110720 Firefox/8.0a1 Regression window with html5.enable = true: Last good nightly: 2010-04-26 First bad nightly: 2010-04-27 Pushlog: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=2968d19b0165&tochange=29a6a85fab8e

Bug 577464 is also about flickering and mentions the same regression range.

WFM on Mozilla/5.0 (Windows NT 6.1; rv:8.0a1) Gecko/20110802 Firefox/8.0a1 There is no flicker when I hoover over the blue line. Reproducible on Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:8.0a1) Gecko/20110802 Firefox/8.0a1 I do get a a flicker on the blue line.

Local track down using x86_64 Linux: The first bad revision is: changeset: 41340:f236632a9747 user: Jeff Muizelaar <jmuizelaar@mozilla.com> date: Mon Apr 05 22:28:54 2010 -0400 summary: Bug 542605. Update cairo to 12d521df8acc483b2daa844d4f05dc2fe2765ba6. r=vlad,jwatt,bas

http://hg.mozilla.org/mozilla-central/rev/f236632a9747 I forgot to tell that the track down in comment 4 was down with html5.enable = true.

Any chance it will be scheduled for fix soon?

Would be nice if it was fixed, really. Imagine a vector editor, relying on paths mouse events. The whole thing becomes a mess and the only working fallback is a painful mouse movement scanning.

Reproduced: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.3) Gecko/20100101 Firefox/10.0.3 Mozilla/5.0 (X11; Linux x86_64; rv:11.0) Gecko/20100101 Firefox/11.0 Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20100101 Firefox/12.0 Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120330 Firefox/13.0a2 Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120330 Firefox/14.0a1

Reproduced Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:29.0) Gecko/20100101 Firefox/29.0

This is fixed by the patch in bug 676001.