The topic of this post has caused me much trouble and many searches for guides have yielded few results. I am in the process of changing my blog theme and I have finally figured out how to change themes safely and easily in the background while visitors see the current blog with the old theme intact.
This is awfully helpful as when you are converting themes, no new theme will fit perfectly with old theme tweaks. Existing ads, comment styles, sidebar contents, widgets and other tweaks that we all have done to our blogs along the way, will need to be customized for the new theme. Some themes break everything or most everything and many changes are needed to be made manually and no one wants to do them live while the world is watching :eek:
Step-By-Step Guide to Change Blog Theme in Background...