I've got a problem with my Bold with firm .150

I'm a BIS user and synchronize my BB with Outlook.

When I add or modify a contact and press Esc to exit and save the contact, appears a box with the three usual options: Save, Discard and Cancel (I suppouse this is the translation because my bold is in Spanish).

If I press, as usually, save after a few seconds it returns to the contact in edit mode, as if nothing had happened. In other cases it tells me that this is an externa contact and "cannot be modified".

After this happens, if I exit without saving and edit again the contact, this is correctly modified and everything is ok.

Is this a .150 bug or perhaps this could happen because I installled (and uninstalled after 1 day) the RIM United software? This software was a nighmare for my Curve.