don't try to cache page if it doesn't exist (fixes #300)
don't try to cache page if it doesn't exist (fixes #300)

topicdesign/topkit-server,topicdesign/topkit-builder,topicdesign/topkit-server,topicdesign/topkit-builder,topicdesign/topkit-server,topicdesign/topkit-server,topicdesign/topkit-builder,topicdesign/topkit-builder