Trouble saving plots to file with 0.53.1

Hello,

I recently installed version 0.53.1, and it's great! The only problem is
that I'm unable to save plots to file. I've tried a few different
approaches (from displayed WXAgg, and GTK plots as well as running savefig()
on undisplayed figures (png & jpg), but have had no luck. Any help is much
appreciated.

Thanks,
Mike