Bug or undocumented feature? Accessing my old threads

A couple of times this week I’ve been searching for an old thread of mine and gotten caught up in re-reading a bunch of others. I have about 25 pages of threads and when I get a few pages into them I suddenly start getting a “no matches found” screen. I’m not performign a search when this comes up, I’m just clicking on a page number. And it’s always a page number I’ve already looked at (the link shows as clicked). Anyone else finding this?

I should clarify. I’m not having trouble navigating within threads. I’m having trouble getting from one page’s display of thread titles to another.

Might have something to do with this already reported problem:

Search IDs expire too soon

your humble TubaDiva