User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:2.0b12) Gecko/20100101 Firefox/4.0b12 Build Identifier: Mozilla/5.0 (Windows NT 5.1; rv:2.0b12) Gecko/20100101 Firefox/4.0b12 Letters in the 3rd row on the 4th page are placed over each other in the center of the line, instead of placed side by side, as in the above lines. Reproducible: Always Steps to Reproduce: 1. Load the web-page 2. Wait for page #4 (bouncing letters) Actual Results: Letters in the 3rd row on the 4th page are placed over each other in the center of the line. Expected Results: Letters should be placed side by side, as in the above lines. This works fine in the latest 3.x version of FireFox (3.6.15 now).

Confirmed broken in trunk and working in 1.9.2 branch (Firefox 3.6.14) From a quick glance at the page source, I can't immediately tell what's going on in that slide -- the demo is dynamically generated from script, and it looks like there are a few scripts involved. So, a reduced testcase would be pretty helpful here. Mozilla/5.0 (X11; Linux x86_64; rv:2.0b13pre) Gecko/20110303 Firefox/4.0b13pre

A regression range might well help too. Lazco, are you willing to help with either the reduced testcase or the regression range?

I do not know, how to make a reduced testcase or regression range, I just noticed the bug and reported it.

Regression window(m-c hourly): Works: http://hg.mozilla.org/mozilla-central/rev/021bf8e64199 Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.3a5pre) Gecko/20100413 Minefield/3.7a5pre ID:20100416094911 Fails: http://hg.mozilla.org/mozilla-central/rev/935bb616b8a6 Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.3a5pre) Gecko/20100413 Minefield/3.7a5pre ID:20100416121540 Pushlog: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=021bf8e64199&tochange=935bb616b8a6 In local build, build from 699e6f9a3660 : fails build from 7a19bc84e572 : fails build from f80de1a7c604 : fails build from aa6171e5b8e7 : works build from e6ba6ff50841 : works build from c7a4f2c4ba7a : works Triggered by f80de1a7c604 Timothy Nikkel — Bug 502937. Part 3. Implement lazy frame construction. r=bzbarsky sr=roc

Laszlo: Ok - thanks anyway! Alice0775: You rock.

Narrowing this down, it seems to be something about setting the transform attribute on an SVG element that doesn't have a frame yet.

The relevant part seems to me (just doing a dumb search) in: http://svg-wow.org/res/3.0/scripts/tools/text-effects.js starting at the "effectsLib['bouncing-letters'] = {" line.

Still present in: Mozilla/5.0 (Windows NT 5.1; rv:5.0) Gecko/20100101 Firefox/5.0

(sorry, didn't mean to unassign; reassigning) While I'm already spamming with a comment, I'll note that this is still present in trunk: Mozilla/5.0 (X11; Linux x86_64; rv:10.0a1) Gecko/20111028 Firefox/10.0a1

I haven't been active on this in a while, if anyone else wants to pick this up it would be okay with me. I think the bug is somewhere in the SVG code that handles updating of transforms.

Seems, that with Firefox version 8.0, the sound has gone as well! Can someone confirm it?

Fixed by bug 649114.