"@Dusty Star: Nope, the credits file is just, well, to credit the authors of the fonts in question in the package itself, you don't need to put it on your Kindle

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Did you use one of the new FT override option to make it work, or did it just suddenly work with this update?"
RE CREDIT: Well I bow down to the authors who made this all possible
Well here's the thing. I already had the BIG 125% font folder on my desktop...waiting for that magical day I could finally install it on my K3 (blank screen issues). As you may recall, I had installed it on my K2i with no problem, very happy with it.
Spoiled and wanted it on my K3 too.
So today, seeing you had a new font update (4.0 for K3g) I installed the bin update, then the Big 125% font package....same thing...blank screen. So thinking about this...I decided to install one font from the folder...and restarted...seeing what changed...as I went along, installing each one at a time, restarting...everything else was getting darker, crisper...till finally I installed the Serif_Regular.ttf and there is was...The menu enlarged exactly way it looked on the K2. No blank screens or issue per each install/restart. As per previous post above...you know how thrilled I am.
I have no idea why the full install of the font package would not work. I forget now which of the 12 fonts I did installed individually...only about 5 of them. No need for me to add the others, everything is perfect as is. I am now reading books on the 3rd level from the Aa font size choice, whereas prior till today I had to read it on the 6th level to read comfortably. The menu text (the real issue I had, having to read it with magnify glass) is enlarged and easy to read book titles and authors now.
Again, THANK YOU!