I've updated the patch, now it should work if the checkbox "Delete previous results at search begin" is unchecked and there are multiple searches.
Looks good so far (works as expected, at least on linux, no test on windows yet, but this will follow).
I did not look into the (changed) source-code, but I think the patch will be accepted (after the release).
Please remind me, if I should forget it (I am quite busy at the moment).