The straight answer for this question is NO. There is no common interview for IBPS RRB Officers 2012 passed candidates. It is very clear from the result status published for the passed candidates. Here is the words mentioned for the passed candidates.
Candidates who have secured minimum qualifying scores as stipulated in the CWE and meet the eligibility criteria notified by each RRB in their recruitment advertisement, shall have to apply online to the RRB of their choice. Depending on the number of vacancies RRB will decide the number of candidates to be interviewed in the ratio of 1:3. Remaining applicants may not receive an interview call from the RRB.
Many of you might have seen it, but this post is only for the candidates who didn't observe it and asking about the common interview.