SVN Version works. Download from svn.
Maybe you must change in:
..\win32\win32richmemo.pas (Line: 141)
from
PrepareCreateWindow(AWinControl, Params);
to
PrepareCreateWindow(AWinControl, AParams, Params);
I tested it with Lazarus version 0.9.29 fpc 2.4.1 svn 23844