[plt-dev] setup-plt errors: in.sxref compiled for wrong version

Running make install, I get a long series of errors of this form:

/Users/cce/plt/trunk/doc/algol60/in.sxref::0: read (compiled): code
compiled for version 4.2.1.5, not 4.2.1.6
/Users/cce/plt/trunk/doc/browser/in.sxref::0: read (compiled): code
compiled for version 4.2.1.5, not 4.2.1.6
/Users/cce/plt/trunk/doc/cards/in.sxref::0: read (compiled): code
compiled for version 4.2.1.5, not 4.2.1.6
.
.
.

What's going on here?  Shouldn't setup-plt / make install be
rebuilding these?  I got these yesterday during a setup-plt -D as
well, which is confusing because they appear to be documentation files
and I would expect them to be excluded from setup-plt -D.

Carl Eastlund