[plug] Gnome Terminal (Bash) Resize problem

[Tim White]

If I resize my gnome terminal while I'm running something (i.e. man) it 
doesn't update the $COLUMNS and $LINES environment variables causing 
bash to stuff up long commands (wrapping the back to the start at the 
correct place according to $COLUMNS but not starting a new line)
How can I fix this (other than always resizing the term while at a bash 
prompt) ?
Tim