cr1t1calh1t - 5:28 pm on Nov 21, 2011 (gmt 0)
I've been seeing this a lot lately, but more so with truncations of actual URLs on my site, with ... appended to the end.
The linking pages that GWT lists as the source of these malformed links are scraper and mashup sites that use Bing's search results. These pages include an actual hyperlink to my site, as well as the truncated url...
I have also been noticing more 404 traffic coming to strange URLs - URLs that are very similar to actual URLs, but with slight changes. I haven't seen any of these show up GWT, though.