First Problem :
I try to insert accented characters values into a table using OCI and PHP4.0.2
the characters ? became i , ? became h ...etc.....
When i do the same query using sql+ there are no problem 
 - this  problem have been solved using htmlentities to convert accented chars to html and decoded in oracle using a stored procedure.

Second problem :
When i maque a select query on values that are accented,  accent desapear :  for exemple "r?sum?" is stored in the table and the query return "resume"

Do you have ever heard about this problem ?

Thanks a lot you make a very good job !