Kovid, I'had read about "debug device detection" in the FAQ as well (I tried to do my homework) but under Preferences->Advanced I only have these options:
a text field: Maximum number of waiting worker processes (needs restart): 6
a button: Check database integrity
I don't see .... oops.... I see the latest version in listed in bold is 0.6.43 but my version is 0.6.17. Sorry, I misread the version, you were right I have an old one. But I don't understand, I just downloaded last version from: http://calibre-ebook.com/download
and now it says 0.6.43 there. Regardless, I'll upgrade and try again.