Empty topic title comes out when editing

I have just updated the Minibb to the last version and when I try to edit a topic the title goes out for me in white, though it puts a title in the database the field is empty.
That it are bad?

Sorry for my English)

Try to look at the source of your editing page. May be there is some mistake in HTML code, also check editing template for that (tools_edit_topic_title) comparing it to the original. It's not normal, the mistake is coming from the upgrading process. In the past there were some variable changes regarding this template.

Thank you very much.

Solved, the name of the field has changed into the form.