When importing, Induvidual Prefixes don't seem to "take" and apply. Why is this, and how does one get around it?
Why?, well I have no idea (sorry to dissapoint!)
How to get around - well, it would appear that civi requires the numeric Value (1,2,3), rather than the label (Mr, Mrs etc) for the option. To find the values for substitution one can go to:
administer > System Settings > Option Groups
and hit the "options" link to the right of "Individual Contact Prefixes". The prefixes in your csv will need to be substituted with these values.
Hope that helps...