Ya the camera app takes great pictures but when the flash is on in camera mode. It doesn't just flash it is a solid beam of light as if the flashlight widget was on. Try it at night it is blinding. I took it to Verizon before I rooted it because I thought it had been programmed. They took two out the box and showed me that they all do this. Then they called Casio and confirmed it.
On the voicemail thing I tried making a contact and making the number *861234 but it says that something weird it doesn't take me to messages.. hmm??
Oh and you didn't mention what dialer that your got from the market?? Maybe thats why voicemail contact doesn't work like that