Since upgrading to WM2003, when I open Calendar in month view it takes about 20 seconds before the appointment icons appear. They appeared almost instantly in the WM2002 version.
I've deleted all past appointments but it's had no effect.
I thought it might be because my Axim X5 is getting pretty loaded with stuff, but there's still 10.6Mb of the 63Mb main memory free, so that ought to be enough.