Ive noticed this as well, not only that but VS2005 is very bad at changing the current control. I regularly need to right click => properties to actually make sure im editing the right control.
Anyway I digress.
I found you can highlight the row / column select resize from the right click menu and at the bottom there is a "clear all heights" or "clear all widths" option.
It makes me wonder what is special about tables in VS2005, compared to frontpage or word which seem to have no problems.
Hope this helps anyway;
Scott, MBCS