bar plot in log scale

Hi

I am having a trouble with making a bar plot with log scale enabled. When setting simply log=True in the bar () command, all bars have junk values of kind 1E-100. When using semilogy () on the other hand, not all stacked bar elements get drawn, plus what is being drawn starts "in the air" above the zero level (attached two eps files).

I must be doing the wrong thing, I suppose.
Regards
Tomek

one.eps (96.5 KB)

two.eps (92.9 KB)