I am not sure if this made its way here, it was mentioned in a conversation on the ACS data users forum (https://acsdatacommunity.prb.org/acs-data-issues/acs-data-for-small-geographic-areas-and-population-subgroups/f/2/t/236) that for 2015 the ACS has changed the way it suppresses median income and certain other income tables.

Basically if the MOE is higher than the estimate the data will be suppressed.  This may cause a change in how much data you can download for these tables, especially at small areas.  Of course if the MOE is higher than the estimate, it may have been a good idea to give it a pass in the first place. :)

More info at http://www.census.gov/programs-surveys/acs/technical-documentation/user-notes/2016-01.html
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