Thanks Sharkie and mcluvntheboss for the appointment icon fix!
As for the Windows Mobile and how it handles Daylight Savings Time, I believe this is the latest hotfix from Microsoft:
Windows Mobile cumulative update for daylight saving time (DST) December 2009
It's a cumulative update - should include all the previous DST fixes. I'm not sure if it will resolve the issues being reported, but it can't hurt to include it in the ROM, I figure.