I updated from SVN version 285 to 288, and in doing so I now have problems with the message sort order on BincIMAP. It's working fine on my Courier server.
What happens is that the messages in the inbox are in random order, even though the "date" column header is highlighted. If it refreshes to check new mail and finds something, it does go at the top. However, once you reload the page the messages return to their previous order. The order doesn't correspond to any discernible pattern.
If I move back and forth between pages, the messages stay in the same order.
BincIMAP does not support server-side sorting, so the usual sort functions in Roundcube are disabled (column headers are not clickable.) Perhaps there needs to be an additional capability check that can default back to client-side sorting in this case?
I really, really wish I didn't have to deal with BincIMAP, but I guess it does help to hunt down bugs in lesser-used code paths...
Jim