"4KB" folder size error Rated 4 out of 5 stars

Can anyone figure out a way to get rid of the erroneous "4KB" folder size shown for POP3 and Local folder name row?

This error is appearing in the 0.3 and 0.4 versions (and in the unofficial patched versions of each).

This review is for a previous version of the add-on (0.4).  This user has other reviews of this add-on.