U. S. Citizenship and Immigration Services (USCIS) advises customers that, due to a tremendous increase in the number of applications filed, the processing of fee payments and entry of cases into our tracking system has been running behind schedule.

All forms are now current except for I-130s (Petition for Alien Relative), which are expected to be current by mid-February.

USCIS place some new Q & A about this on their website: http://www.uscis.gov/