Calibre 2.68 发布了。Calibre是电子书管理软件，支持Amazon、Apple、Bookeen、Ectaco、Endless Ideas、Google/HTC、Hanlin Song设备及格式，功能十分强大。更新内容如下：
新特性
Add a tweak to Preferences->Tweaks to control the list of servers calibre considers public email servers
Bug修复
Content server: Fix a regression in the previous release that broke the OPDS feeds for libraries with no custom columns
Edit metadata dialog: Fix auto-generation/validation of author sort values not working when only changing case of the author name.
A nicer error message when calibre fails to create the temporary directory.
Fix dates being set to empty in bulk search/replace not becoming UNDEFINED
Edit metadata dialog: Make pressing up on an undefined numeric field set the value to zero instead of -99999.
Conversion: Handle corrupted JPEG files that have valid headers but invalid data.
Conversion: Improve detection of input documents that use uppercase tag/attribute names.
Fix regression in previous release that caused incorrect display of ratings in the side panel of the metadata download dialog
Get Books: Update publio and virtualo store plugins for website changes
Fix reading metadata from PDF files broken by poppler >= 0.47.0
Change the application name set in Qt to calibre from libprs500.
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