I tried the Librarian yesterday after hearing about it in "The Scientist" and found it to be a beginning of a great project, already useful and with a lot of room to grow. However, I already ran into a limitation. When I try to upload a .pdf that is 3+ Mb in size I get the "Error! All fields in the form are mandatory." error and the record does not get inserted into the database. I don't know what the exact size cutoff for this bug would be, sorry.