[MACTCL] Button backgrounds aren't transparent

[Tim J. <tj...@to...>]

Has anyone else noticed that default Button controls are not 
transparent?  They have a box around them that is white.  Is this a bug 
that I should report, or have I missed a configuration option for Aqua 
buttons?  It seems that the button ignores a *background option 
setting.  Here's a snapshot: