Thank you for your help, but it appears that it just ain't my day.

I went to http://repository.maemo.org/pool/dia...e/libx/libxpm/
and clicked on
libxpm4_3.5.6-2osso1_armel.deb

Blasted application manager informed me that it could not install it because it was an "incompatible application." Usually there is a "click for more details" button in the dialog, but it was absent from this dialog.

OS2008 version 4.2008.30-1 is Diablo, is it not? That's what my tablet's control panel about product applet tells me.

I'm not sure what else could be causing the problem.