I'm using the plugin on a site I'm migrating form Blogger. Part of the images were imported properly, while others are ignored with the message:
WARNING - We have found some <img> tags that do not link to images.
This plugin currently ignores these in case it is a mistake and we parsed something incorrectly.
The IMG tag contain images and they are accessible. I suspect that the RegEx is having trouble with some of them. Here are some examples:
<img border="0" src="http://2.bp.blogspot.com/_aJjOTDPB7zQ/TQ_GkHVZfiI/AAAAAAAAAnM/ZnHy0OsOBG0/s1600/green_triangle.png"><br> <img border="0" src="http://4.bp.blogspot.com/_aJjOTDPB7zQ/TQ_Gcl9l6qI/AAAAAAAAAm8/ZPrKr5y_x7o/s1600/blue_square.png"><br> <img border="0" src="http://3.bp.blogspot.com/_aJjOTDPB7zQ/TQ_GrA_gruI/AAAAAAAAAno/-EY_HGvbOl0/s1600/yellow_star.png">
Those are the only ones that won't work on blogspot.com. Then there is the issue of images hosted on ggpht.com (which I think is Google's CDN). None of those work (same error as above). Here's one example:
<img title="Screen Shot 2014-01-09 at 7.19.57 pm.png" src="http://lh4.ggpht.com/-xXQ2CgHB23A/Us7pmdaIVbI/AAAAAAAABgs/USeihhOIxBQ/Screen%252520Shot%2525202014-01-09%252520at%2525207.19.57%252520pm.png" alt="Screen Shot 2014 01 09 at 7 19 57 pm" width="574" height="182" border="0">
The URL ggpht.com is also not included by default in the plugin, but that's a detail. The main problem is the import isn't done correctly.