The Gemara in Pesachim 117a brings a disagreement whether כס יה, in the last pasuk of Beshalach, is one word or two. As far as I know all modern Sifrei Torah (Ashkenazi, Sefardi, Teimoni) have two words, but according to מאורות נתן, the Keter has כסיה as a single word.
What does כסיה mean? Is it still "the Throne of Hashem" or does it mean something different?