According to Media Factory, the releases of Queen’s Blade: Utsukushiki Toushitachi vol 5 and vol 6 has been delayed due to production issues.
Volume 5 will ship on January 26, 2011 instead of December 22, 2010.
Volume 6 will ship on February 23, 2011 instead of January 26, 2011
Source: AT-X
