TRUENAME, DIRECTORY and PROBE-FILE relied on chdir(), which alters the
global state of a program. This means they could not be used concurrently in
a multithreaded program -- for instance Slime and Swank.
I am working on a new implementation of these functions that is thread safe.
So far TRUENAME is finished and if testing succeeds tonight I will upload
Instituto de Física Fundamental, CSIC
c/ Serrano, 113b, Madrid 28006 (Spain)