Yes, but lets be a little courteous about it.
Free means "dont complain" IMHO.
You know, I changed the settings last night to the white font and a larger type size, which helped a lot. But this morning they were back to the RFF default settings.
I am sure things will be ironed out in a few days. But if we don't tell them we're having problems, they can't fix it.
"Color scheme on new RFF sucks!!!"
The people in charge have done a big effort. Perhaps we could propose our better ideas using a suitable positive language ?
Cheers,
Ruben