[Flac] FLAC: win installer

[Harry Sack]

hi,

when i look here:
http://sourceforge.net/project/showfiles.php?group_id=13478

there are 2 win installers:

flac-1.1.4a.exe and flac-1.1.4b.exe

what's the exact difference between them and why is on the flac site only
linked to the flac-1.1.4a.exe installer?
Is the flac-1.1.4b.exe one maybe for testing?

thx
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