Giving 2.7.1 a go, and all was looking good until I got to the point of customizing publish layouts. I can reorder fields etc. just like normal, and save without issue. However, I noticed that weirdness creeps in whenever I start working with the tabs:
* Add a Tab and it shows up in the tabs listing lowercase, regardless of the case you enter, and displays spaces as underscores. Not a huge deal, but far from ideal.
* More importantly, when I move fields (e.g., entry date) to another tab (e.g., options) and delete those the empty tab (e.g. date), it saves successfully, but then I find that fields seem to disappear on the Publish page (particularly URL Title and other fields that may have been resized, etc.). I can’t do anything to get them back but reset the pub layout to default.
After fumbling with this for a bit, I did a clean install to make sure it wasn’t coming from a module, and got the same bugs. Is anyone else running into this? Or have ideas on how to sidestep it?