Hi, As reported here: expt currently wrongly prints the results for any negative base numbers. The attached patch (also attached with the bug tracker) has a fix and also adds a test case. This is my first patch to guile, so please correct me if I have done something wrong. I will be happy to rework it. I am yet to recieve the assignment papers from the FSF (but they have been despatched already by the FSF), I will mail them back as soon as I get it. thanks --   Ramakrishnan