若已使用3.1.0的可以不用更新，沒什麼差別
LINK
2012/04/05: version 3.1.1 = tag release-3-1-1
2012/04/04
7732: Remove the non-existant -O6 optimization level (blickly)
7755: CryptoPP: Fix build with GCC 4.7
2012/02/22
7728: Update GNU config.guess and config.sub to version 2012-02-10
7727: Makefile: call `$(CPP) -x c` instead of `cpp` (ygrek)
7726: Add support for Debian/Hurd
2011/10/25
7647: Update options description of allow_local_network (ygrek)
7646: Include .desktop file in source package (ported from Arch Linux)
7645: DC: show hashing progress in dcinfo (ygrek)
7644: Fix broken target release.utils.static
7642: Update GNU config.guess and config.sub to version 2011/10
7641: DC: fix ownership for downloads by non-admin users (ygrek)
7593: Less allocations (ygrek)
從今以後版本只有簡易版，為了減輕CPU負擔
source:Albert
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