cygwin unix path is not longer recognized

[kumarchi@attbi.com]

folks:
I installed octave for windows. But this installation somehow mangled my cygwin 
(latest feb 9, 2003 )

cygwin no longer recognizes unix type paths
I cannot say
/bin/ls or /cygdrive/d/bin/ls

It has to be
d:/cygwin/bin/ls


How can restore my unix paths?

Thanx
- kumar


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