No. 432, “Undetected Minority-polarity Flux, Moss, and Coronal Heating,” by Yi-Ming WANG. There’s plenty of room in “unipolar” active regions for both polarities, and there is good evidence for them.
No. 433, “Fast Prograde Flows in Solar Active Regions,” by Hugh HUDSON. Unexpected, unpredicted, and not modeled yet – weird flows in hot active-region loops.
We welcome contributions to the RHESSI Nuggets, and the topics may wander some distance away from specifically RHESSI results if they are generally interesting. See http://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/RHESSI_Science_Nuggets for these and others. Comments about specific flares can often be found by searching for their SOLyyyy-mm-dd identifier from this home page.