[imp] Accented letters. IMP options

[cfont at xtec.cat]

My question is related to the following versions:
Horde 3.1.1
IMP 4.1.2 
When I put in anything field in the Options, General options, Personal Information of the IMP application ,some information with accented letters, and save it, when I return to enter in the same section all in all fields has missing, as if nothing has been write in the database. However, I have verified that the information exits in the horde database correctly. 
I have anything wrong or it is a bug?
Thanks.