Weird scrub problem

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Hello,

I am currently facing some strange problem, most probably a bug (osd.3
is a primary holder):

ceph pg scrub 4.458

2014-12-22 19:19:00.238077 osd.3 [ERR] 4.458 osd.34 missing
6f0df458/rbd_data.cbba8a759d2.0000000000000a5b/head//4
2014-12-22 19:19:00.238079 osd.3 [ERR] 4.458 osd.10 missing
6f0df458/rbd_data.cbba8a759d2.0000000000000a5b/head//4

Checksum is exactly the same on every OSD which included in this
complaint and so the file count:

find 4.458_* -name \*cbba8a759d2* -exec md5sum {} \; | sort
\106f7a2b6c0d71d52031d2bd92ea9111
4.458_head/DIR_8/DIR_5/DIR_4/DIR_2/rbd\\udata.cbba8a759d2.00000000000000db__head_73442458__4
\2db655db8c7b0a1cccbec79bbc9fc923
4.458_head/DIR_8/DIR_5/DIR_4/DIR_F/rbd\\udata.cbba8a759d2.0000000000000a5b__head_6F0DF458__4
\6505c6c8ccb3c103618c5ef0a22d3414
4.458_head/DIR_8/DIR_5/DIR_4/DIR_C/rbd\\udata.cbba8a759d2.00000000000014ec__head_B37BC458__4

Extended attributes looks relatively well, or at least not suspicious.
Automatic repair is failing on those, what should I try next?
Unfortunately I cannot go over export+rm+import on most of those
images just to delete appropriate prefix.
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