libpng2 troubles

[joseph evan porter <jeport0@ewl.uky.edu>]

I installed the latest WindowMaker at home, and upgraded the libraries as
discussed in previous posts to this list.  I have 0.19.2 working fine at
work, and it seems that my two setups are identical (except for hardware
and kernel, of course).  When I type startx with wmaker as the default
window manager, the x server exits, and .xsession-errors reads

...libpng2: error loading shared libaries
undefined symbol: __register_frame_info

I can't figure it out.
Any and all help would be greatly appreciated.

Thanks,
Joe Porter