What's new in v2.8:

*) CRS317: fixed links not coming up after power failure;
*) CRS317: added extra information about FAN & PSU health;
*) CRS317: fixed load balancing over aggregated links;
*) CRS317: increased per port queue size;
*) CRS328-24P-4S+: make FAN work;
*) CRS328-24P-4S+: added extra information about health;
*) CRS328-24P-4S+: do not power cycle PoE outputs on reboot;
*) CRS328-24P-4S+: added voltage-level setting;
*) CRS328-24P-4S+: make SFP3 port work;
*) CRS328-24P-4S+: expose PoE port status via SNMP;
*) CRS328-4C-20S-4S+: make FAN work;
*) CRS328-4C-20S-4S+: added extra information about health;
*) CSS106: expose PoE port status via SNMP;
*) CSS106: always strip VLAN header on ports with disabled VLAN mode;
*) CSS106: make access to SwOS work over VLAN 1, put vlan header in replies;
*) CSS106: do not vlan tag RSTP BPDU packets, makes RSTP work with RouterOS;
*) CSS106: forward IGMP query messages even when IGMP snooping is disabled;
*) make PPPoE & DHCP snooping work on CRS326 & CRS328;
*) CRS326 & CRS328: make removed ACL rule stop working;
*) CRS326 & CRS328: learn MAC addresses even redirecting packets from ACL;
*) CRS326 & CRS328 & CRS317: added strict VLAN mode;
*) if "Allow From VLAN" is specified, make discovery packets use it;
*) make DHCP client work with RFC non compliant DHCP servers;
*) do not allow to create multiple VLANs with the same id;
*) provide health information (temperature, fan speed, psu state) via SNMP;
*) provide SFP port healt information via SNMP;
*) use 64bit counters under Stats tab for byte accounting;

For me manual upgrade don't work. I only see "don't interrupt", switch reboted (I see it uptime on router in neigbord)

CSS326-24G-2S+ v 2.7 doesn't see the upgrade on the upgrade page.
After upgrading manually from 2.7 to 2.8 the switch boots into 2.0p - from that version I can upgrade manually to 2.8 ...

CRS+CSS: How many ports can be aggregated concurrently with LACP at maximum?

CSS326-24G-2S+ v 2.7 doesn't see the upgrade on the upgrade page.
After upgrading manually from 2.7 to 2.8 the switch boots into 2.0p - from that version I can upgrade manually to 2.8 ...

on my CSS326-24G-2S+ manual upgrade dont works.
switch not accessible(web) after manual upgrade.
to access the switch again, i had to boot backup SwOS.
i tried upgrade from backup SwOS(2.0p) to 2.8, and reset configuration - but no success.

*) CRS326 & CRS328 & CRS317: added strict VLAN mode;

I have been using these switches

Hello,
We are investigating your reported issues about missing information in CRS328-24P-4S+ SFP and PoE menus.
Meanwhile, you can load primary SwOS v2.7p from Serial Console in the same way as on CRS326-24G-2S+
https://wiki.mikrotik.com/wiki/SwOS/CSS ... _Reinstall

*) CRS326 & CRS328 & CRS317: added strict VLAN mode;

What is the difference between this new "strict" VLAN mode and the enabled mode, described in https://wiki.mikrotik.com/wiki/SwOS/CSS326?

Hello,
We are investigating your reported issues about missing information in CRS328-24P-4S+ SFP and PoE menus.
Meanwhile, you can load primary SwOS v2.7p from Serial Console in the same way as on CRS326-24G-2S+
https://wiki.mikrotik.com/wiki/SwOS/CSS ... _Reinstall

I can confirm port22 without "waiting for load". CRS328-24P-4S+, SwOS 2.8

Hello,
We are investigating your reported issues about missing information in CRS328-24P-4S+ SFP and PoE menus.
Meanwhile, you can load primary SwOS v2.7p from Serial Console in the same way as on CRS326-24G-2S+
https://wiki.mikrotik.com/wiki/SwOS/CSS ... _Reinstall

"strict - Same as enable, but also checks VLAN support for inbound interface (drop packets with VLAN tag ID and ingress port that are not present in VLAN table)"

From https://wiki.mikrotik.com/wiki/SwOS/CSS106
VLAN mode.PNG

I have been using these switches

What switches? Please specify exact model(s).
Some small switches (like the RB260 series) are known to have a rather weak CPU which can easily be maxed out when being constantly monitored via ICMP.