NO, that won't be it. I can't speak to MOBI's made by Calibre--you should ask Kovid; but to resolve the issue, use a "start" tag wherever you want the bloody thing to open, i.e., name="start" or id="start" (html or xhtml, respectively) and, IF Calibre is using KindleGen, which I assume (famous last words!) that it is, your Kindle should automagically open to that page. Just stick it anywhere--adjacent to your first chapter's header, or what-have-you. KindleGen and MobiGen look for that naming convention to set the "start reading" location...but again, this presumes that KindleGen is not overriden with Calibre.