Modeline font gets screwed up

Hi, I have posted this message to comp.emacs.xemacs as well, but later thought that this would be a more appropriate place. Sorry for the un-neccessary copies. Now for the bug: I have noticed some strange behaviour with respect to the modeline font settings. I customized the modeline font from the 'Edit Faces' menu option and set it to Helvetica. Often, however, xemacs comes up with some other wierd font. I have to open my ~/.xemacs/custom.el file and cut out the modeline font customization and re-paste it elsewhere in the file in order to restore Helvetica as my font. There is a pattern to this. It seems that whenever the ~/.xemacs/custom.el file is modified, the modeline font customization gets screwed up. The default font is not affected though. I am not subscribed to this list, so please Cc me any replies. Regards, - Apurva