I'm bitten by this one too. Here's a patch.
diff -ru xaos-3.4/debian/menu xaos-3.4-patched/debian/menu --- xaos-3.4/debian/menu 2010-01-20 17:14:13.000000000 +0100 +++ xaos-3.4-patched/debian/menu 2010-01-21 01:04:31.000000000 +0100 @@ -1,6 +1,6 @@ ?package(xaos):needs="text" section="Applications/Graphics" \ title="Text Xaos" longtitle="Text Xaos fractal zoomer" \ - command="/usr/bin/xaos -driver aa'" + command="/usr/bin/xaos -driver aa" ?package(xaos):needs="x11" section="Applications/Graphics" \ title="Xaos" longtitle="Xaos fractal zoomer" \ - command="/usr/bin/xaos -driver x11'" + command="/usr/bin/xaos -driver x11"
