Why won't themes work in the Cydia app?


Hi, i have a jailbroken ipod touch 2g (MC) jailbroken with a userland jailbreak (JailbreakMe 2.0).  I have some themes that work perfectly on my ipod, except in the actual cydia app.  The "loading data" spinner is still the standard apple one, not the themed one.  Also, the background is just the standard apple gray stripe background.  Does anyone know how to make the themes work in cydia? thanks.