Well I set up gmail and sent a message, the person responded, I see that but then I (from my computer) sent another message, part of the same conversation. A day later away from my computer I could not remember if I had send my response. the n900 did not show my latest reply in the conversation so I waited went online and looked at gmail (not the n900 version) and it did in fact show my reply.

so what is up with this? does the person have to respond to my last message (or conversation as google calls it) in order for me to see the last thing I sent to them?