Since 6.2 (and XE-1419) there is no base skin by default which mean that if you forget to set a base skin in your wiki skin it inherit directly from /templates and /resources. XE-1419 was done mostly to make sure colibri and flamingo were not going to inherit from each other. This leaded to http://jira.xwiki.org/browse/XWIKI-11443, I see several possibility to close this issue: 1) won't fix, if you want a default base skin then just set it in xwiki.cfg 2) put back the default skin in xwiki.defaultbaseskin (so flamingo) in xwiki.cfg 3) force wiki skin to fallback in default skin The issue with 3) is that it makes impossible to do a wiki skin from scratch (why not ?). Now that filesystem skin explicitly indicate there parent skin 2) is not a problem anymore for them so we could put it back, I guess my +1 goes to than and that's what I will do to unlock 6.4 if there is no answer. I don't have a strong opinion on it since I pretty much never ever do any wiki skin, just want to close this issue... -- Thomas Mortagne