"sorry-no matches"

Is there a system glitch somewhere? On many occasions, if I click on "find all post by “XXX” I get “sorry -no matches…” I just got this even though I can see that the poster is on line! Sometimes I can get around this by going to their profile and clicking the “find all psots” link from there, but that only works occasionally when I’ve already gotten the “sorry no matches” message when I clicked on their sn in a thread and tried the link from there. I know it isnt my system, as it has happened on other computers and to other posters. Whats up?

Anthony? Roger? Can you help with this?