I'd noticed this bug before but had blamed it on Accuweather.
Turns out the culprit is really Psiloc World Traveler.
If you run PWT and go through the settings and check Options->Settings->Weather on main screen (ENABLE) it will create a To-Do list item in the Calendar with the following typical parameters:
Title: 32 C Wind: 4 m/s
Due date: (today)
Priority: High
Description: 32 C Wind: 4 m/s
Most notable is that I had selected Farenheit as my temperature units in PWT, but it displays its main weather screen in Centigrade and m/s, though it does display the forecasted highs and lows in Farenheit.
I have tried the other features and times display correctly. I have not validated currency exchange rates, but they "look" about right.
This negative affect on another program is totally undesirable.
YET ANOTHER BUGGY PROGRAM THAT IS NOT QUITE READY FOR THE N97.
*** UPDATE...shortly after delving into this program I experienced a "rolling crash"...first the web browser lost its top and bottom right sidebar menu buttons. Literally they disappeared and the zone were no longer touch sensitive. Then the display went back to the home screen, went one-quarter intensity, then went totally white (full intensity) then little lines of different colors went across the display left-to-right and then the unit restarted.
I suspect the PWT program may have had something to do with it since it put junk into a home screen applet (see above).