There appears to be a bug in the method CommunityServer.Components.Globals.GetSkinPath() . If CS is running at the root of the Web Site spaces in the skin filepath name are converted to a + (plus), but if CS is running in a Virtual Directory they are...
The CommunityServer.Components.HtmlScrubber is removing spaces from "src" and "href" attributes, which it shouldn't be doing. If you use the "basic blue" theme, or any other theme that has a space in it, images may not...