Auto-Insert of closing single quote and backspace broken

Build 219, VS2005

Auto-insert of closing parens, brackets, and quotes is on (default setting)

Type the following:

char c = '

The result is this ("|" indicates current cursor position)

char c = '|'

this is as expected. Now press backspace. You end up with this:

char c = |'

The auto-inserted single closing quote isn't deleted. This works fine for
double quotes, parens, and brackets. It just fails to work for single
quotes.