Hi,
I have just noticed that in any settingspage something strange is happening to the WYSIWYG field. It can be edited in the Visual mode, but BUT it is not possible to change into the text tab, the field just stays empty and no input can be made, is that supposed to be like this ?
You can try to update Meta Box and MB extension plugins to the latest versions. Then deactivate all plugins except Meta Box, MB extensions, switch to a standard theme of WordPress and recheck this.
.
