I just noticed that in 2004 SP4 (maybe in other versions) that if you have, 'Advanced Graphics' enabled in your material properties AND you have 'Real View' disabled (i.e. standard enabled), the rebuild times to scroll through the Feature Manager is several seconds per feature as opposed to instantaneous without Advanced Graphics on.
Quadro FX500
2004 SP4 2.66 Ghz Dual XeonThis is probably old news since I never use the fancy settings.
Mike Wilson