There was a litlle bug in CFW M33-6 recovery menu.
When changing the option for version.txt, the options for Speed up MS access can be affected.
Therefore Dark Alex released a fix, the bugfix was too small for a complete new M33-7.
So he only released the recovery.prx for M33-7 :) and he only released it on the forums, which are now gone.
Just copy the recovery.prx to flash0:/vsh/module/ and click "yes" to override.
thanks to ErikPshat (PSPx) for the info
EDIT: FYI: this is not new it's from may 2009.