Whereas I agree that there must be some size restrictions, especially in the Programming Questions or Project Guidance sub forums which may otherwise be filled with high resolution screen shots etc., I believe the 1MB per post restriction in the Exhibition / Gallery sub forum is too small. Say, a PDF document describing a project with reasonable resolution images can easily exceed that.
Of course, I can find somewhere else to publish my projects but it would be more convenient here.
I recommend at least 2MB per post in such a sub forum.