In Lime 2.5 RC5 I am unable to load the "listquestions" view of a survey with Postgres as the DB. Upon clicking the "List Questions" on the left menu bar in the admin interface, I receive the following error:

Internal Server Error
CDbCommand failed to execute the SQL statement: SQLSTATE[42601]: Syntax error: 7 ERROR: zero-length delimited identifier at or near """"
LINE 1: ...) WHERE t.sid='284337' AND t.language='en' AND parent_qid=""
^
An internal error occurred while the Web server was processing your request. Please contact the webmaster to report this problem.
Thank you.

It appears to be related to double quotes being used instead of single, for the empty string parent_qid but I could be mistaken.

Additionally, I receive the same error upon saving a Question Group

Internal Server Error
CDbCommand failed to execute the SQL statement: SQLSTATE[42601]: Syntax error: 7 ERROR: zero-length delimited identifier at or near """"
LINE 1: ...nguage ) WHERE t.sid=0 AND t.language=NULL AND parent_qid=""
^
An internal error occurred while the Web server was processing your request. Please contact the webmaster to report this problem.
Thank you.

However the Question group saves fine, its just the error pops up upon save.

Thanks