Oh - and one other small fix:
If you have an issue or trade which has a cover image assigned, but is showing the "No Cover Image" thumbnail, you can just edit it and hit OK on the "properties" dialog, and the thumbnail will be created. You don't need to click "Tools|Reload Thumbnails" any more.
This has been a bit of a bugbear for a while, and I finally fixed it because clicking "Tools|Reload Thumbnails" on a trade would, of course, go off and try to reload all the thumbnails for the trade's issues. So now if you need to generate a thumbnail for your trade, you can just click "Edit" and "OK". 