cannot concatenate 'str' and 'list' objects

[Νικόλαος Κούρας]

I swicthed back my code to:  f = open( '../' + page )

and http://superhost.gr works which means that line gets parsed correctly.

Only when i post data to the text area boxes iam getting the error:

cannot concatenate 'str' and 'list' objects 

how is this possible to work before and NOT work when i enter data to the page for storing to the database?