Jim,

>>How good a job do you think has F1 done in maintaining backward compatibility?

>I recall that they did a fairly major rewrite in one version, it may well have been 6. In any event, there are probably some compatibility issues moving from previous versions to any of the versions after the rewrite. All in all, I think Versions 7.0, 7.5 and 8 are pretty compatible.<

The big rewrite occurred going from 5 to 6. So, based on your experience, would compatibility be decent starting from 6 on up?

-m.