This may have already been tackled via an administrative schema, but here is what I need to achieve:

1.  Profile 'A' should only be able to see records of 'Record Type A'

2.  Profile 'B' should only be able to see records of 'Record Type B'

I called support about this and they said it was impossible to do without an APEX trigger, and recommended that I submit a request to Development.  Any thoughts?