User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:9.0a1) Gecko/20110926 Firefox/9.0a1 Build ID: 20110926030901 Steps to reproduce: I opened http://upload.wikimedia.org/wikipedia/commons/4/4b/Blick_auf_den_Grimselsee_und_den_Raeterichsbodensee.jpg and zoomed in and out using ctrl+mouse-wheel Actual results: At some zoom factors the image is warped and only using a small area on the screen while the rest is black. See attached image. Expected results: The image should have zoomed properly. Disabling hardware acceleration fixed the issue. Using a ATI Radeon HD 4670 Series Driver Version 8.881.0.0 Direct2D & DirectWrite enabled Smaller images work without issues.

Reproduced on Firefox7 to 9.0a1 Regression window(cached m-c hourly), Works: http://hg.mozilla.org/mozilla-central/rev/dad825159748 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0a1) Gecko/20110527 Firefox/7.0a1 ID:20110527011902 Fails: http://hg.mozilla.org/mozilla-central/rev/04e8d0b481bc Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0a1) Gecko/20110527 Firefox/7.0a1 ID:20110527081111 Pushlog: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=dad825159748&tochange=04e8d0b481bc Suspected bug: Bug 562746 - Update cairo to 1.10

Requesting tracking on the affected branches for this regression...

We are tracking this for Fx9...do we still need to? Is there work to be done here or can we ship as-is?

Jeff, at one point, had looked into this, but I'm not sure if he had any ideas.

We've shipped this since 7.

Still not fixed in current trunk

I can not reproduce this issue on Mozilla/5.0 (Windows NT 6.3; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0 I will close this bug. Feel free to reopen if this issue persist for any of you.

Also nonreproducible on User Agent Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:48.0) Gecko/20100101 Firefox/48.0