I wrote a simple program a few days ago and tested it in some computers without Qt installed. The program works fine. So I delivered the program to a client and he was unable to perform any action related with the database (SELECTs and INSERTs - The program is so simple!!!). I'm using a SQLite database and all the operations are made with QSqlQuery. The database has 3 tables (2 with the actual data and one for the relations). All the fields stores numbers except one that stores a string. The problem was identified in PCs (64 bits) with Win7 and in some WinXP Unnatended editions.

There is some known problem with these SO and Qt+SQLite?