I'm having a problem with 1 site collection where all my subsites render blank screens for any pages in the Layouts folder.
For example, I have a site on port 80, http://testsite.ca and when I click on the link for view all site content (http://testsite.ca/_layouts/viewlsts.aspx) or site settings (http://testsite.ca/_layouts/settings.aspx) the page displays as expected.
But for all subsites under this, I get blank white screens. For example, under this site I created a subsite using the blog template, and the site works fine and I can add blog items, manage posts, etc. But if I try to navigate to any items under that subsite that reference the layouts folder (for example http://testsite.ca/blog/_layouts/viewlsts.aspx or http://testsite.ca/blog/_layouts/settings.aspx) then the page is blank.
It shouldn't a permission problem since I'm a site collection administrator, and any new web apps or site collections created don't have this problem, so it appears limited to just this site.
Hopefully this is something someone here has seen before? Thanks for reading.