Update to the latest version 2.5.3 changelog is:

Version 2.5.3 -- 02nd Aug 2009 - Features added * Prints warning if summary is empty * Prints warning if description is empty * Add support for r-forge.net (option --rforge) * Add support for r-forge.r-project.org (option --rproject) * Add the prefix R- to the list of dependencies with a list of package to ignore (ie: R) * Add a default source0 and url if the bioconductor release is not set - Bugs correction * Does not add the 'Requires:' to the spec if they are empty * Changes the '-' into '.' if the version of the R library contains any '-'