Potential problems with REGAL software Shuba Gopal, Rochester Institute of Technology 31 March 2006 We have been notified that an error exists in the version of the REGAL software that was uploaded to BMC Bioinformatics. We are investigating the nature of the error and its impact on the software and our published results. Please DO NOT utilize the version of the software as currently available. It will not function as specified. We will post a comment to this site as soon as we have corrected the error. Competing interests I am one of the authors of this paper and have no competing interests.