I really like the new way to insert SubFigures. However, I had a bad surprise when I tried to look at the LaTeX output - uncomprehensible errors about missing (or spurious) endgroups appeared.
It turned out that I must not put any ERTs with \psfraq replacements inside the sub-figure float. Moving them to the enclosing figure float solved the problem. As I always like to keep the \psfrags close to the figure they relate to and LyX did not stop me from doing this kind of thing, I wonder if a) there is a way to prevent this kind of surprise, b) documenting is be the way to go, or c) LyX could be extended to natively support psfrag replacements. Günter