steps: 1. load help>about in minefield 2. look for ©1998-2009 Contributors. All rights reserved. (Licensing information). actual results: attachment 355395 [details] ©1998-2009 Contributors. All rights reserved. ( Licensing information). expected results: ©1998-2009 Contributors. All rights reserved. (Licensing information). the model is <description>... (<label>...</label>)</description> data:text/html,<div style="width: 0">(<span>this is a test</span>)</div> bz suggested: presumably the frame in question is not claiming to be a text-flow frame or some such

In fact, it looks like a <label> with no @value gets an nsXULLabelFrame, which is just an nsBlockFrame. Should it get a frame by display or something (with the accesskey logic moved to the content node)? Or can we do the line-breaking right somehow while keeping this a blockframe?

As far as I can tell, label is acting like any other replaced element. Try styling the <span> with a display of -moz-box and see what happens! In (e.g.) Mozilla 1.6 I think you used to be able to work around it by styling it with display: inline; but that doesn't seem to work any more. As for moving the access key logic to the content node, I think this is done by frames to avoid registering access keys in some cases, although I forget which.

Moving to Core:XUL per https://bugzilla.mozilla.org/show_bug.cgi?id=1455336