I just installed the plugin and I have a strange problem with the results it's showing. I'm getting a white page and I can only see the images.
Take a look at this: http://img22.imageshack.us/img22/6253/lyte.png
In that screenshot I'm using Touchfolio theme. I also tried with Twenty Twelve theme and I'm getting the same results, a white page: http://imageshack.us/a/img189/6599/b5x4.png
I noticed the results are there and are clickable, I just can't see them (I only see the images as I said before).
I also noticed it has to do with the amount of results I set ("Max. results" under plugin settings). If I choose a number below the number I set in "Results box viewport", I will not see that white page and everything works fine. If I choose a number higher than what I set in "Results box viewport", I'll get a scroll bar in the results and that's when the problem occurs, when there are more results than what I set in "Results box viewport".
If I choose a very high number for "Results box viewport", then the plugin will make the WordPress results page "create" a scroll bar for the whole page itself. Then if I do a search, I get a white page, but since there's a scroll bar in the WordPress page, when I move the bar, it automatically shows the results. It's weird.
I tried disabling ALL my plugins and tried on Firefox 22.0, IE 10.0.9200.16635 and Chrome 28.0.1500.95 m. In every browser I get the same problem.
I'm using WordPress 3.6.0, Ajax Search 1.4 and Windows 7 x64 SP1.
Here's my search page: http://leandroprz.com.ar/buscador/
Do a test search with "via lactea", you'll get lots of results and a white page. Do another test search with "vaca" and you'll get only a few hits and no problem at all.
If you need access to my WordPress dashboard just let me know. Hope you can help me.