I am not sure if this should be posted here or in CPT addon bugs (it has happened on a couple of CPTs – but might happen on Places without CPT addon enabled?) – so please move if appropriate …
anyway, I have the worst type of bug: intermittent (I’d say happening between 5 and 10% of the time).
When adding a Fieldset in Custon Fields, I get to the point of pressing the save button and it pops up a message box: ‘HTML Variable Name must not be blank’ – now, there isn’t a HTML Variable name on Fieldsets! if I press ‘OK’ then it pops up the same message, supplemented by a checkbox with the following message: ‘Prevent this page from creating additional dialogues’ I don’t check the box, but do press ok to get rid of the box. I then delete the fieldset and create a new one, put in the same info and it saves fine… most frustrating.
Let me know if you need any more details, but I think that’s about it.