Slic3r perimeter speed settings grayed out

ruggb

I went to use my printer this AM and the settings in Slic3r for perimeter speed are grayed out.
It is the same on another computer. Why?
RH 2.0.1

ALTprinter

I am having the same problem too. Typically it hasn't been greyed out for me, until I starting running my print speed slower. I'm confused as to why its happening as well.

Repetier

Never seen. Only know that if support is disabled the support interface speed gets disabled. Maybe update to latest host version especially if you are also on 2.0.5.

Jmgerard

I just installed Slic3r latest version for the Mac. Was using Simplify3D. I, too, See that the overall speed is grayed out and set to 80mm/s. This option is under the Advanced settings. I can set the "Max Volumetric Speed". Also under "Acceleration control" I can Set only the Default value. I can set all other speed settings. Lets Hope that the values I set for the other speed settings will over ride the "Max Print Speed" setting.

Repetier

They should override. Greyed out should mean not used or automatically computed from other values.