[Plugin: WPSMF – WordPress to SMF] Images quality bad when exporting

I am not sure which is related this plugin or Posterous Importer plugin.

As you can see the image quality decrease when exporting.

Have a look here:

https://nathanblogs.posterous.com/i-make-it-break-on-themios-4

After exporting to SMF

https://dev.nathan-source.com/smf/index.php/topic,146.0.html