In order to increase the precision of Time, an instance variable, milliseconds, has been added and the secondsSinceMidnight instance variable has been renamed to millisecondsSinceMidnight in VisualAge Smalltalk V6.0. This change should be transparent to existing applications since the API for Time was not changed, but only extended.

The object loader mutation method for Time has been updated to account for the difference in class shape. This will make loading instances of Time that were dumped by a previous version of VisualAge Smalltalk work correctly as long as you did not specify the optimization of not including variable names when you created the dumped file (the default behavior is for variable names to be included).