Jameson Graef Rollins <jrollins@finestructure.net> writes:

> On Tue, Aug 20 2013, Istvan Marko <notmuch@kismala.com> wrote:

>> This is controlled by notmuch-show-part-button-default-action. 
>>
>> There are also the "." bindings, hit ". C-h" to see them.
>
> Hi, Istvan.  Yes, I'm aware of these options, and they're not the issue.
> This button is behaving differently than buttons for inline image/*
> parts in other messages.

I see. Not sure what's going on then, for me they behave like other
buttons, with notmuch-show-part-button-default-action set to
notmuch-show-view-part RET shows them inline or with an external viewer.

-- 
	Istvan