Export to HTML incorrectly saves one or more page images making Pencil mostly unusable for my prototype development

[Google Code Exporter]

What steps will reproduce the problem?
1. Create any medium complexity prototype. My specific examples are 10 or 11 
pages
2. Attempt to export a single web page HTML (standard or with with thumbnails
3. Wait, and wait and wait and wait.
4. The export may complete but one or more pages have incorrect page images 
exported. Usually the previous page image is saved instead making the export 
useless

What is the expected output? What do you see instead?
Expected - The prototype is properly exported and accurate
Actual - Assuming it finishes as all, one or more of the exported pages contain 
the wrong page image

What version of the product are you using? On what operating system?
Evolus Pencil - V 2.0.6 on Mac OSX 10.10.4 (however this has been an issue for 
as long as I've used Pencil and across multiple OSX versions

Please provide any additional information below.
In order to correct the issue I have to first identify the broken pages, then 
manually export the broken page to a new location and hand patch the original 
export file.

This makes Pencil almost totally useless for my prototyping and wireframe 
development

Original issue reported on code.google.com by [e-mail] on 14 Jul 2015 at 6:47