It seems that the string c which holds the name of the day in wpaint.c is too small and a stack overflow is caught when the Week button is pressed for the week view.
Here is a quick patch to prevent the overflow for all the languages
that the app supports.
--- wpaint.c.orig Thu May 25 17:25:06 2006
+++ wpaint.c Thu May 25 17:25:20 2006
@@ -179,7 +179,7 @@
{
int i, x, y, rightx;
int cwidth;
- char c[8];
+ char c[10];
cwidth = xv_get(font, FONT_DEFAULT_CHAR_WIDTH);
First = current;
