failed to save fontmeister.css

Using WordPress 3.5 with FM Version 1.04

Problem presented:

“Failed to save file fontmeister.css. Please check your folder permissions.” (I have no idea where this file exists on the server having looked for it in a few places; FWIW – this error message ought to be at both the top and the bottom of the page)

Using Google API Key for browser apps (with referers)
Activated on: May 10, 2012 4:07 AM

Google web font used in experiments:
Crete Round (from Google Fonts)
Font preview shows up fine.

CSS selectors used in experiments:
none
h1,h2,.pagetitle

Problem presents when trying to SAVE (big blue button all the way down at the bottom of the FontMeister – Font Stack page)

What should I try next?

Thank you very much Sayontan!

Kelly

http://ww.wp.xz.cn/extend/plugins/fontmeister/