Link to post TYPO3 sys_category bug after upgrade from 6.1 to 6.2

After a recent update from TYPO3 6.1 to 6.2 on a site that makes use of the new sys_category function, I noticed a strange behaviour: Even though categories were shown in the front end and, if viewed with the list tool in the backend, also showed as defined, they were not selected on their according…