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Here is the link to the general release notes for the SG500 series switches. However, as you can see, there are no specific release notes for the 1.4.1 firmware yet. However, here is the link to the open source for the 1.4.1 firmware.
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Unfortunately I do not have that information. Your best option is to check periodically for an updated release note for the firmware. I apologize that you were not able to get help regarding this inquiry.
However, if you have any further questions, please do not hesitate to ask!
There are many businesses that have policies in place that don't allow the use of firmware/software upgrades unless the release notes are available and checked.
I use this site to monitor for changes on Cisco pages among others: https://www.changedetection.com/
I shouldn't have to check back and use a special site to monitor for changes. This is a business product and as such the release notes should be made available at the same time as the firmware. This isn't some little home-office product.
The SMB switch product team is working to get the 1.4.1.03 release note available some time next week.
Yiu Kay Lee
Concentrix at Cisco
.:|:.:|:. CISCO | Yiu Kay Lee | SMB Pre-Sales | email@example.com | Phone +1 (855) 354-7776
and there they are: http://www.cisco.com/c/dam/en/us/td/docs/switches/lan/csbms/Sx500/release_notes/R_1_4_1_RN.pdf