Hi, Given that this change is about display of search results, I have the suspicion that the following two factors might be more relevant: - size of the Emacs frame: bigger would mean more threads to show - composition of the search results, specially length of the threads displayed, as the longer they go, the more hidden text there will be And because of this, though you might already have a proper method for measuring it, the results are different. I thought about this because my searches have only ~180 threads, yet I could notice the difference. Servilio