Continuing the discussion from Error at TERNET IDP Changing Password:
There is also a bug in the IDPPublic code that users might come accross while resetting passwords. Really an issue of the error not correctly reported.
You can recreate by trying to update with the same password when resetting. This triggers the general error message ""An error occur to the system performing the requested action. Please, try again in few minutes and if the problem persist send an email to "IDPAdmin." and confuses users.
Using a different password works fine.