Why would an issuer want to file on Form D rather than Temporary Form D, and vice versa?

From September 15, 2008 until March 16, 2009, issuers may satisfy their obligation to file a Form D notice with the SEC by filing a notice using either Form D or Temporary Form D as a template. Each form requires slightly different information. For instance, Temporary Form D requires the issuer to provide information on beneficial owners of 10% or more of the issuer’s equity securities, while Form D does not.

http://www.sec.gov/info/smallbus/formdcompare.htm