Ignore my previous comment - I was apparently chasing red herrings yesterday.
There seem to be several interacting bugs that were leading me in circles: The Snapping Windows plugin does very broken things when resizing an xterm window, shading of windows is very broken, and there appear to be multiple sizing issues if border_width != 0.
If I disable Snapping Windows, don't shade any windows, and use 'xterm -xrm xterm.borderWidth:0', everything seems to work ok, so hopefully I can start over and trace out a single issue at a time.
Ignore my previous comment - I was apparently chasing red herrings yesterday.
There seem to be several interacting bugs that were leading me in circles: The Snapping Windows plugin does very broken things when resizing an xterm window, shading of windows is very broken, and there appear to be multiple sizing issues if border_width != 0.
If I disable Snapping Windows, don't shade any windows, and use 'xterm -xrm xterm.borderWid th:0', everything seems to work ok, so hopefully I can start over and trace out a single issue at a time.