version 2.1
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Fix cracked.com
Check Book: Fix an error caused by empty style tags when auto-renaming mismatched font names. Fixes #1363028 [renaming incorrectly named fonts fails](https://bugs.launchpad.net/calibre/+bug/1363028)
Fix a regression in calibre 2.0 that caused setting the value of a custom number column to zero via the book list to clear the field instead. Fixes #1363076 [The number zero doesn't appear](https://bugs.launchpad.net/calibre/+bug/1363076)
Driver for SurfPad 3. Fixes #1363025 [Device non detected](https://bugs.launchpad.net/calibre/+bug/1363025)
Edit Book; Fix editor hanging when quitting during a background save operation and the save operation completes before the warning dialog is dismissed. Fixes #1363122 [Edit Book: Blocked when saving and exiting...](https://bugs.launchpad.net/calibre/+bug/1363122)