Hi, there is a bug in LoadingPanel that prevents wheel events from being processed. This happens only when used with OpenLayers.Control.Navigation.
It works with the default usage: http://dev.openlayers.org/addins/loadingPanel/trunk/examples/loadingpanel.html but making these changes to the same example will allow anyone to reproduce the bug (tested in FF3 and IE7): in the init function: ... // map.addControl(new OpenLayers.Control.PanZoomBar()); // map.addControl(new OpenLayers.Control.MouseToolbar()); map.addControl(new OpenLayers.Control.Navigation()); ... this is, comment out PanZoom and MouseToolbar and add Navigation. If loading panel is showing because tiles are loading, you *can not* use the mouse wheel to zoom in/out. After loading or deactivating the loading panel mouse wheel works as usual. Here are some previous reports that may offer some more details on the problem: http://openlayers.org/pipermail/users/2009-February/010246.html http://openlayers.org/pipermail/users/2008-December/009508.html -- Manel Clos
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