[Nirf]

Hey, I used the windows version of Calibre and it worked absolutely flawlessly in every respect. Boy was I impressed, so I'd like to shout out a thanks to the developer of calibre, Kovid Goyal. Fantastic work. I'm now using the Linux version, and it still works well with just one hiccup. The metadata and cover image retrieval features don't work well (even though I'm signed up at the websites and all that). Here are the error messages I get in both cases:

Could not fetch ISBNDB metadata. Error: [Errno socket error] (-2, 'Name or service not known')

and

Detailed traceback:
Traceback (most recent call last):
File "library.pyz/calibre.gui2.dialogs.metadata_single", line 260, in fetch_cover
File "library.pyz/calibre.ebooks.metadata.library_thing", line 41, in cover_from_isbn
File "library.pyz/mechanize._mechanize", line 203, in open
File "library.pyz/mechanize._mechanize", line 229, in _mech_open
File "library.pyz/mechanize._opener", line 181, in open
File "library.pyz/urllib2", line 399, in _open
File "library.pyz/urllib2", line 360, in _call_chain
File "library.pyz/mechanize._http", line 700, in http_open
File "library.pyz/mechanize._http", line 677, in do_open
URLError:

for the cover image. Help, suggestions? thanks in advance.