I have installed Frame market and Gridmarket on a Marketpress multisite.
I have followed the instructions for installing Child themes and Network activated Gridmarket only.
My problem is twofold.
Firstly, I have uploaded a new header image to the exact specifications shown 980 px x 100px however, this has been cropped horizontally. By at least 30%. Are the size specs incorrect?
Secondly, despite the upload of a new header, the theme remains unchanged in the front end.
(I have also been having similar trouble with other customising (to footer.php) not showing up as changed).
NB. I do not have any cache plugins installed.