Here is the version I'm on v0.10.12.29-gf7b7e35-beta
I typed Darksend auto and this is what showed up in the debug log file:
2014-08-15 17:17:03 DoAutomaticDenominating : No funds detected in need of denominating (2)
Same here..
Please show screenshot of coin control with list mode ticked.

Did you tick enable darksend and have amount at >300. Also, make darksend rounds =1. Check whether -0.001 is deducted. Type darksend auto in console.
May as well just wait for the new update. I have the same issue Ozzie.