We upgraded from version Version 7.10.10 to Version 7.10.12 few days ago. When we went to make changes to a Role, we tried to modify permissions to all modules by selecting the header to avoid going one by one but it no longer works. I tested on version 7.10.10 from other installation and all seems to work fine on there. Not sure if bug was introduced on version Version 7.10.11 or Version 7.10.12. BTW I was able to replicate error on Version 7.11
Please let me know if there is a work around until a the official patch is released.
Thanks,