I have a WebDateChooser in a user control.  If I just place the user control on a page by itself it appears as intended.   However on every page in the web application that I use it the height of the box grows by several pixels leaving white space above the drop-down button.

The WebDateChooser in the user control is in a table cell.  I have increased the cell size so the control has plenty of space around it.  If I increase the height of the control so that white space appears above and below the drop down, on the web pages the height still increases making more white space above the button.