Just started today (10/21/15). Check out the page using Brand=Hikvision and Pan Tilt Zoom=yes (All in every other field). I now see only --- for every PTZ camera.
https://www.synology.com/en-us/compatibility/camera
Examples(with Firefox 41.0.2 on Win 10 Pro desktop):
Just one day ago the Hikvision PTZ camera DS-2DF7286-AEL would show PTZ it now shows---.
and the new 8MP Hikvision camera DS-2CD4A85F-IZH would show Z it now shows ---
Trouble ticket submitted to Hikvision web support today(10/21/15).
FYI, same behavior for Internet Explorer and Edge on my desktop.
Also posted this problem on the Synology Surveillance Station forum:
https://forum.synology.com/enu/viewtopic.php?f=82&t=106132
You see this too?