POA-90227 Strange behavior when clicking Registered Domains > Manage DNS in CCP
Included from KB123627:
POA-89525 Customer can manage providers NS settings
Hotfix can be downloaded here.
Use pa_updates_installer (http://kb.odin.com/en/111323) to install this hotfix. Also this hotfix will be installed automatically during upgrade to POA 5.5.8 via pa_updates_installer. To install hotfix manually obtain its distributive from the link above and follow instructions found in file UPDATE.txt of distributive.