error in laplace

[Alberto Candel]

hi,
something is wrong with the laplace function in the CAS. One of the examples in the Help menu is laplace(sin(x)^2,x,s) and my Prime returns Error: Bad argument Value.
Other examples are weirder. For instance, laplace(sin(x)) returns 1/(1+x^2) but before that, a warning shows reading: Unable to check if antiderivative e^... ( some strange charecters).