Hi,
this looks like the classic skin is horked. Find the
~/.mozilla/.../.../chrome/user-skins.rdf
and make it look somewhat like this:
<?xml version="1.0"?>
<RDF:RDF
xmlns:NS1="http://www.mozilla.org/rdf/chrome#"
xmlns:RDF="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
<RDF:Description about="urn:mozilla:package:editor">
<NS1:selectedSkin resource="urn:mozilla:skin:modern/1.0:editor"/>
</RDF:Description>
<RDF:Description about="urn:mozilla:package:chatzilla">
<NS1:selectedSkin resource="urn:mozilla:skin:modern/1.0:chatzilla"/>
</RDF:Description>
<RDF:Description about="urn:mozilla:package:global">
<NS1:selectedSkin resource="urn:mozilla:skin:modern/1.0:global"/>
</RDF:Description>
<RDF:Description about="urn:mozilla:package:cview">
<NS1:selectedSkin resource="urn:mozilla:skin:modern/1.0:cview"/>
</RDF:Description>
<RDF:Description about="urn:mozilla:package:messenger">
<NS1:selectedSkin resource="urn:mozilla:skin:modern/1.0:messenger"/>
</RDF:Description>
<RDF:Description about="urn:mozilla:package:communicator">
<NS1:selectedSkin
resource="urn:mozilla:skin:modern/1.0:communicator"/>
</RDF:Description>
<RDF:Description about="urn:mozilla:package:inspector">
<NS1:selectedSkin
resource="urn:mozilla:skin:classic/1.0:inspector"/>
</RDF:Description>
<RDF:Description about="urn:mozilla:package:xmlterm">
<NS1:selectedSkin resource="urn:mozilla:skin:modern/1.0:xmlterm"/>
</RDF:Description>
<RDF:Description about="urn:mozilla:package:vixen">
<NS1:selectedSkin resource="urn:mozilla:skin:classic/1.0:vixen"/>
</RDF:Description>
<RDF:Description about="urn:mozilla:package:navigator">
<NS1:selectedSkin resource="urn:mozilla:skin:modern/1.0:navigator"/>
</RDF:Description>
</RDF:RDF>
Axel