Having trouble displaying some html emails

[Bart Bunting]

Hi everyone,

I am having an issue with html emails displaying correctly.

For some reason the first time I view a html email it displays
correctly.  All subsequent attempts to view html emails result in the
following error:

mm-shr: Wrong type argument: bufferp, "*Summary*"


The message opens but the parts are hidden like this:

[ multipart/mixed ]
[ text/html ]


I'm not exactly sure what is going on here or what the best way to debug
is?

Any one have any ideas or suggestions?

Kind regards

Bart