There is a new fix that replaced sweep_dust with sweep_unmixable. It is in master, so you will need to either try building your own non-release or wait for the next update.
It's not just sweep_dust, my wallet balance is 233 and I am unable to move them:
transfer_new 2 44pFi8kPVuyeuGMYSUctVB1RMHyf6W8W7SNYTcmRWCrGcCTeA2xv68qiXUAvfuP3dNTnDuHFj8x8viY gzjo9cDZm7bysCV3 230
Error: not enough outputs for specified mixin_count = 2:
output amount = 0.000409493368, found outputs to mix = 1
output amount = 0.002414704633, found outputs to mix = 1
output amount = 0.003717045132, found outputs to mix = 1
output amount = 0.003606717702, found outputs to mix = 1
output amount = 0.009650623277, found outputs to mix = 1
output amount = 0.006665032337, found outputs to mix = 1
output amount = 0.009533575300, found outputs to mix = 1
output amount = 0.004791355170, found outputs to mix = 1
output amount = 0.002659999878, found outputs to mix = 1
output amount = 0.009310307244, found outputs to mix = 1
output amount = 13.710000000000, found outputs to mix = 1
output amount = 0.001342661501, found outputs to mix = 1
output amount = 0.000803378292, found outputs to mix = 1
output amount = 0.004706702380, found outputs to mix = 1
output amount = 0.008922997310, found outputs to mix = 1
output amount = 0.007809272310, found outputs to mix = 1
output amount = 0.003133238788, found outputs to mix = 1
output amount = 0.005944119888, found outputs to mix = 1
output amount = 0.009974389276, found outputs to mix = 1
output amount = 0.001947352563, found outputs to mix = 1
output amount = 0.009374052943, found outputs to mix = 1
output amount = 0.007383043021, found outputs to mix = 1
output amount = 0.002457197904, found outputs to mix = 1
output amount = 0.009857052484, found outputs to mix = 1
output amount = 0.007818049378, found outputs to mix = 1
output amount = 0.008702140695, found outputs to mix = 1
output amount = 0.000331096140, found outputs to mix = 1
output amount = 0.002760541350, found outputs to mix = 1
output amount = 0.005597569951, found outputs to mix = 1
output amount = 0.008160421065, found outputs to mix = 1
output amount = 0.008662205823, found outputs to mix = 1
refresh
Starting refresh...
Refresh done, blocks received: 59
Balance: 233.062914014341, unlocked balance: 233.062914014341, including unlocked dust: 1.442914014341
Doesn't work with mixin 0 neither