SSHA hash are stores as '{ssha}......' and '{SSHA}......'

Hello,

We are authenticating from some Java written software against an OpenLDAP system by reading the users 'userPassword' LDAP attribute, calculating the clear text password against the SSHA hash string.

It turned out that some (a few number) of these hash are stored in the form:

userPassword:: e3NzaGF9R2tSOU91SGhOakFoZzBWeVNtY0JHRUE5b2NMVU5GZWZnY0VaMXc9PQ==

which decodes to:

$ echo 'e3NzaGF9R2tSOU91SGhOakFoZzBWeVNtY0JHRUE5b2NMVU5GZWZnY0VaMXc9PQ==' | openssl base64 -d {ssha}GkR9OuHhNjAhg0VySmcBGEA9ocLUNFefgcEZ1w==

i.e. with SSHA in small letters. It's only 1 of thousand users having the tag as '{ssha}'.

Why is this?

Thanks

matthias