Updates:
Status: Invalid
Comment #3 on issue 1094 by pekka.klarck: Java error when embedding
arguments in keyword name.
http://code.google.com/p/robotframework/issues/detail?id=1094
My guess is that the JRE error had nothing to do with Robot directly. I
think I've seen similar errors some times with Selenium server. Anyway, if
the problem occurs again and seem to be Robot related just open a new issue.
Good that you also got the actual problem with embedded arguments solved.
Those quotes have no special meaning in the keyword name. As I already told
you can also omit them or use some other characters. Please submit another
issue if the User Guide section about this topic isn't clear enough and you
have an idea how to improve it.