This is more of an annoyance than anything else, but maybe there is a simple solution? I use numerous catalogs, so I have Lightroom prompt me for a catalog on open. Works fine. When I switch catalogs, LR immediately goes to the Import window for the new catalog. No cards inserted, and auto-import is turned off. Only happening on Windows 8 laptop, not on Win 7 desktop. Any ideas?
Haven't heard of this sort of behavior before. Have you tried resetting the preferences?