NCBI have recently announced the release of v2.2.31 of BLAST+ (hat tip to Torsten Seemann for alerting me to this). Find out more here:

This release is of interest to me as it fixes a bug introduced in v2.2.30 that broke our CEGMA software (which relies on TBLASTN):

Reenabled support for word size 5 in tblastn.

This bug was something that I reported on back in February.