In Ruby one can invoke methods with or without parentheses:

some_method(arg1, arg2)
some_method arg1, arg2

ruby-mode currently does not handle properly the indentation of calls without parentheses that span several lines:

# indented properly in 24.3
some_method(arg1,
                     arg2)

# not indented at all in 24.3
some_method arg1,
arg2

Ideally the second code example would be indented by ruby-mode like this:

some_method arg1,
                     arg2

-- 
Cheers,
Bozhidar