What is "*) improved wireless TSF handling;" in the changelog mean?
What is TSF and how was it improved?
So your conclusion is right, i had this problem with a PCMCIA 5213 radio and it's resolved with 2.8.25I suppose they are talking about TSF = Timing Syncronisation Function. This is implemented in 802.11 systems to ensure all participating wlan systems have a common time/clock. In systems using an AP (i.e. no ad-hoc wlans) all clients adjust their clocks to the timestamp contained in the beacons the AP sends out regularly.
This is for example important for energy saving modes. Most cards can sleep "most of the time" just waiting for a packet to arrive. For this to work, everybody on the network has to be "awake" during the same period. This is being coordinated by adjusting internal clocks by means of the TSF.
That's my understanding of it. What they actually improved I don't know - but would be interesting. I suppose that a bug/problem in TSF implementation could lead to funny problems like bandwidth drops (when stations are sleeping when they should receive a packet, which has to be re-transmitted etc.) or the like. But as I said - no clue what actually happened.
Perhaps someone from MikroTik wants to comment on it?!