  We investigate some versions of amoeba for tree-forcings in the generalized
Cantor and Baire spaces. This answers [10, Question 3.20] and generalizes a
line of research that in the standard case has been studied in [11], [13], and
[7]. Moreover, we also answer questions posed in [3] by Friedman, Khomskii, and
Kulikov, about the relationships between regularity properties at uncountable
cardinals. We show $\Sigma_1^1$-counterexamples to some regularity properties
related to trees without club splitting. In particular we prove a strong
relationship between the Ramsey and the Baire properties, in slight contrast
with the standard case.
