Fixed the wrong named element in a checking condition of an array storing class objects.
Added the ability to set meta box visibility conditions with in-page tabs.
Fixed the warnings: Strict standards: Declaration, due to not defining parameters in the base class methods.
Fixed the error: Fatal error: Maximum function nesting level of '100' reached, aborting!, caused by the constructors of the admin page classes trying to call parent constructors with unsupported way in some PHP versions (confirmed in v5.4.3).
Fixed the warnings: Strict standards: Declaration of ... should be compatible with ....
Fixed a bug that assigning a property value in a wrong variable.
- Fixed the error: Fatal error: Maximum function nesting level of '100' reached, aborting!, caused by the constructors of the meta box classes trying to call parent constructors with unsupported way in some PHP versions (confirmed in v5.4.3).
- Fixed strict standard warnings confirmed in PHP v5.4.3.
Fixed undefined variable warnings.
Fixed a bug calling non-existing class.
Fixed Notice: Array to string conversion.
Fixed a bug that the capability property was not set properly in the meta-box-for-pages class.
Changed the version to 3.0.0b2. Fixed #54.