Peter Seebach writes:
 > I noticed that the IO and file tests failed with some frequency.  Has
 > anyone gotten this working, and is there anything obvious?

It's because Tcl expects the size returned by stat to be 32 bits, but
NetBSD returns 64 bits.  Here's a patch:

diff tclUnixAZ.c /cdrom/tcl/tcl7.4p1 
689c689 
<       sprintf(interp->result, sizeof(statBuf.st_size)==8 ? "%qd" : "%ld", statBuf.st_size); 
--- 
>       sprintf(interp->result, "%ld", statBuf.st_size);