"An unidentified error has occurred." on Custom Field update

[adiant]

Whenever I click Update to update the contents of two different Custom Fields, I get "An unidentified error has occurred." in pink at the bottom of the Custom Fields area of Edit Page.

It appears to be related to the fact that the value of the two Custom Fields involved begin with a first line made up of only the two characters "?>". When I remove the first line, the error disappears.

Despite the error message, the Custom Fields do appear to be updated correctly.

I am using the Default Theme. This error occurs in the three browsers that I have tested: IE8, IE8 in Compatibility Mode, and Firefox 3.0.10.

[Denis-de-Bernardy]

Probably a dup of #10167

[ryan]

I see this only when pressing Update without changing the value. We're currently issuing an error if the value hasn't changed. Fix for that on the way. Are you seeing this for other cases too?

[ryan]

(In [11644]) Don't show error message when updating a custom field without changing its value. see #10254

[ryan]

(In [11645]) Don't show error message when updating a custom field without changing its value. see #10254 for 2.8.1

[ryan]

I'll assume this is fixed. Reopen if that is not true.

[adiant]

You are right. I have only been able to recreate this problem (in 2.8) when no changes are made to a Custom Field.