Support different units in "Attachment max. size" field.
This may be me personally, but I can't recall the last time I needed to control upload sizes on the KB level. So, everytime I want to change that value, I need to crack open the calculator to figure out what the number is in MB.
It'd be nice if the KB value could be selectable and Redmine handled the appropriate unit conversion internally. Otherwise, I'd advocate defaulting to MB and allowing decimal values.