That doesn't seem to apply to Windows.

D:\>perl c:script.pl
C:\path\script.pl

D:\>perl c:..\ikegami\script.pl
C:\path\script.pl
[download]

I could still apply to other systems, though (VMS?)

Update: Looking at the source, it uses getdcwd (as opposed to getcwd) with the appropriate volume, returning the correct path even when different volumes are involved.