Oh - and I know this is totally the wrong place to ask for it but while I think of it (since my registration response email from the new tracker never arrived)...
Could the preferences dialog for user columns be enhanced to make use of the massive unused real-estate to show some additional columns of information about the type and formulas contained within those columns? It would save a huge amount of clicking when you just want to review what columns you have setup and what types they are, rather than repeatedly drilling in with the i button column after column...
