Chris: Don't know if this is the problem, but check the bounds on the tables involved.
The larger the Minimum Boundary Rectangle (MBR), the less precision.
There may be other ways to find the MBR for a table, but if you export it as a
MID/MIF, then open the MIF in a text editor, you can see
I am working with section line data in MapInfo 6.0 currently in a generic
Latitude/Longitude format. The table's projection property was set to
Category - Latitude/Longitude and the the Category
Member-Latitude/Longitude. No datum appears to have been specified and this
is where I believe