NOTICE GuildPortal will be going offline (permanently) by the end of the month.

GuildPortal FAQ

Frequently Asked Questions about GuildPortal Hosting

Q: Why Isn't My Thumbnail Image Updating?

It can take up to a half hour for thumbnail images to be updated across all of the web servers, since synchronization is done periodically and not instantly for thumbnail images.

This does not affect guild banners or images uploaded via the Guild Control Panel by administrators of a guild; it only affects thumbnail images.