the latest versions of fmms you DO NOT need fapn, fmms has sorted the access point via its own settings, but they're a bit sensitive. if you did download fapn and create a new access point you will need to delete it using fapn as the network connections in maemo wont let you delete a gprs access point as far as i'm aware. if done correctly fmms will auto receive mms in havoc mode without doing a thing, as mms should on other phones.

for vodafone uk settings i had to try the settings a few times, i believe i fixed when i went to the advanced tab and deleted all the fields rather than leave them as 0.0's (it puts them back, but it worked after that)