According to GlobalSign (one of the largest CA's), they stopped issuing 1024bit keys back in 2010... The lowest encryption they (and most CA's) use now is 2048bits.
https://www.globalsign.com/support/faq/sslfaq.php
All orders placed from November 29th 2010 will only be accepted with a CSR key length of 2048 bits or higher. This is to fully comply with the National Institute of Standards and Technology Recommendations (NIST) and the mandatory requirements by Microsoft's Root Certificate Program to issue Certificates from a minimum of 2048 bits by January 1, 2011.
Maybe it's related to the Y1969 bug
:)
