Over time, the upload process has grown in complexity. Every time we add a new gallery, new rules and exceptions come up that have to be wrestled with by users and moderators alike. It quickly becomes difficult to keep track of and even the most attentive user could miss a rule or guideline here or there.
One of our newest moderators, Quentin94, took the initiative to supplement our WinCustomize Guide article series with an article detailing, on a gallery-by-gallery basis, the file requirements for each and every gallery on the site. File extensions, contents, preview guidelines and more are spelled out in detail.
This is a must-read for every skinner looking to submit content to WinCustomize.