update failed message in admin pages

Topics: Controls
Feb 1 at 6:01 PM
Edited Feb 1 at 7:59 PM
After I upgraded from V3.2.0.3 to V3.2.0.4, every update in admin console will result an "update failed" message, but actually update succeeded. For example, when I add a post category, I will get a "update failed", but new category was still added. the error message was a wrong message.
The error message is: there was an error in the callback.
Feb 2 at 9:01 PM
this error disappeared without a reason.