I am not sure where to begin...
Environment ...
NetBSD 1.6.1
WindowMaker 0.80.1

I have been using acroread5 for some time (months)
and now it has quit working...
Issuing the command ...

acroread5
Iget...
/usr/pkg/Acrobat5/Reader/intellinux/bin/acroread:
1: Syntax error: "(" unexpected

When I try ...
/usr/pkg/Acrobat5/Reader/intellinux/bin/acroread
I get...
/usr/pkg/Acrobat5/Reader/intellinux/bin/acroread:
  Exec format error. Wrong Architecture.

Reinstalling, updating hasn't helped...
Installing version 4 didn't help either...

I get similar behavior from any linux emulation
program.

I am at a loss here