in what appears to be the default htaccess code for this plugin, there is a syntax error:
defiance-mobile :: /home/wptest/public_html/wp-admin $ grep P-ADMIN .htaccess
P-ADMIN SECURE .HTACCESS text above # ADD WP-ADMIN FILE NAMES TO FILESMATCH MAKING THEM 403 FORBIDDEN # DENY BROWSER ACCESS TO WP-ADMIN INSTALL.PHP # BEGIN OPTIONAL WP-ADMIN ADDITIONAL SECURITY MEASURES: # WP-ADMIN DIRECTORY PASSWORD PROTECTION - .htpasswd # END OPTIONAL WP-ADMIN ADDITIONAL SECURITY MEASURES
[Sat Jan 12 16:27:23 2013] [alert] [client <blah>]
/home/wptest/public_html/wp-admin/.htaccess: Invalid command
'P-ADMIN', perhaps misspelled or defined by a module not included in
the server configuration, referer:
this appears to occasionally mess with wordpress causing an "uncompleteable redirect" error in firefox. adding the comment obviously remedies this issue but this should be fixed in the next update so it is not necessary for admins and site owners to do it themselves.