log10, was: bug report, or am I doing something wrong?

luke,

i have made an attempt at a log10 implementation.
you can get it here:
http://cvs.sf.net/viewcvs.py/maxima/maxima/share/contrib/log10.mac
click on the "(download)" link.
copy it to a file and then enter load("path/to/my/file");

this script establishes some of the well-known properties of log10.
i hope it's enough to help you solve whatever problems you have.

hth
robert dodier