e block is referenced by two objects, then in database two copies of this block will be stored.
And after reloading of these objects, there will be two independent blocks in memory. 
Also DyBASE doesn't store current position in the block. So the block <code>next [1 2 3 4 5]</code>
will be stored as <code>[2 3 4 5]</code>.

<LI>All other Rebol type (money, URL,...) will be converted and stored in database as strings.
And them will be also loaded as strings.

<LI>As far as Rebol doesn't provide weak referenc