Client Tools :: Characters Differences Between SQL+ And SQL Developer

we have an issue on a server, where if we insert a value containing foreign characters from SQL+ we see it screwed up from SQLdev, whereas if we do the same insert from SQLdev it's then screwed up in SQL+.

All operations are performed on the DB server itself, SQLdev connection type is TNS and the entry being used is the same as the one used by SQL+.We checked v$nls_parameters and the values contained there are the same from both SQL+ and SQLdev.