After upgrading all (14) my APs to 3.0, especially my 5GHz APs are bad. I have one where only 4 clients are connected to, all RB133C and with 2.9.50 it was running 100%, 15+Mbps full duplex. After upgrade to 3.0(RB532A/R52H on AP) the clients were so bad, I couldn't even log into some, or disconnect after few seconds. Clients have Compex WLM54AG cards.
Playing with frequencies, making higher seemed to be better so I upgraded all clients to 3.0.
Now it is a bit better, but max speed is about 3Mbps full duplex.
No hardware changed, pre 3.0=fine, 3.0=unhappy clients.

On another 5Ghz site also had problems where previous working clients could not connect. Power down, upgrade to 3.0, reboot, power down, etc. got them working again. Pre-3.0 all was fine. My 2.4GHz sites are just for internet so performance issues are not that obvious and I haven't investigated that yet.

Hope MT will have some answer, should I go back to 2.9.50 or press through with 3.0 & wait for an update?

Please make the support output file from the routers where you have performance issues, so we could look into it.
Send them to support@mikrotik.com

After upgrading all (14) my APs to 3.0, especially my 5GHz APs are bad. I have one where only 4 clients are connected to, all RB133C and with 2.9.50 it was running 100%, 15+Mbps full duplex. After upgrade to 3.0(RB532A/R52H on AP) the clients were so bad, I couldn't even log into some, or disconnect after few seconds. Clients have Compex WLM54AG cards.
Playing with frequencies, making higher seemed to be better so I upgraded all clients to 3.0.
Now it is a bit better, but max speed is about 3Mbps full duplex.
No hardware changed, pre 3.0=fine, 3.0=unhappy clients.

On another 5Ghz site also had problems where previous working clients could not connect. Power down, upgrade to 3.0, reboot, power down, etc. got them working again. Pre-3.0 all was fine. My 2.4GHz sites are just for internet so performance issues are not that obvious and I haven't investigated that yet.

Hope MT will have some answer, should I go back to 2.9.50 or press through with 3.0 & wait for an update?

We are having issues upgrading to 3.0 Final. Seems like on 2.4Ghz that broadcom chipset have problems with associating. playing around with hardware retries helps some of them but not all. On 2.9.x no problems.

/Henrik

garbage in = garbage out.

garbage in = garbage out.

Wauv!

Also have problem on some of my 2.4GHz sites. Throughput is notably less, even with 3.1
2.4 & 5GHz