I have this strange issue with updateCMSFields() for blog tree. I try to remove some fields in the cms for blog tree page type. I am using 0.6.0, and I noticed in BlogTree.php, there is no SiteTree::disableCMSFieldsExtensions() and SiteTree::enableCMSFieldsExtensions() being called around the parent::getCMSFields() method. I added those and of course, I added $this->extend('updateCMSFields', $fields) right before returning the fields.
In the extension, I just use normal removeByName() just like what I did in BlogHolder and BlogEntry extensions. And I surely added entries in the _config.php file. The strange thing is BlogHolder and BlogEntry extensions work as expected, only BlogTree extension doesn't seem to do nothing!
Thanks in advance! This is really driving me crazy.