Firefox 4.0.1 w/ Firebug 1.7.2 and Acebug 1.5 - Using clean profile
Resource panel inactive - Trying to enable using the tabs mini-menu or the hyperlink on the tab does nothing. Using the Firefox menu button and selecting 'Enable All Panels' does not enable the panel.
thank you for reporting this bug.
fixed this in commit 99d7d1f