Since Plasma NM does not follow KDE SC release schedule I thought posting a list of bugs fixed should be a good idea. Some users do not know we do not follows KDE SC release schedule, some distribution packagers also seem to not know which important bugs have been fixed this year.
Fixes commited between 4.6.1 and 4.6.2 release dates (March 4th - April 6th):
212941, 214985: Ah-hoc wireless and connection sharing are working now. Many thanks to Ilia Kats for this patch.
. Now it is possible to click on the AP name (essid) in the main window and Plasma NM will launch the configuration dialog with the essential settings (connection name, essid, encryption type) already filled in and ask for encryption key. After that the user just need to click on the Ok button to complete the configuration.
269853: Opens Mobile Connection Wizard to create a 3G connection when modem is inserted and no 3G connection has been created yet.
208219: Add PEAP-GTC wireless authentication.
257777: do not save secrets if user asked for it.
241798: vpnc: fix storing/loading of secrets type
268484: Do not send "low signal" notification if connection is not activated.
262555: fix missing secrets for VPN plugins without explicit storage type.
243792: fix connecting to WiFi when "In file (unencrypted)" secrets storage is used.
267952: Enable Del key to remove connection.
267967: Sanitize the Networking, Wireless and Wwan checkbox handling.
. Fix changing VPN password type not being recognised until user logout/login.
Fixes commited between 4.6.0 and 4.6.1 release dates (January 26th - March 4th):
267556: Hide the "Enable Wireless" checkbox if there is no wireless interface available.
248348: Fix potential crash.
263286: Enable notifications.
253584: Prevent potential crash.
266807: Comment some code that unnecessarily triggers polkit authentication agent.
264607: Fix crash in Mobile Connection Wizard.
238046: Fix knetworkmanager doesn´t recognize BSSID.
266097: Fix potential crash.
210878: Another try to solve the dangling pointers problem.
. Add support to Wwan (AKA Mobile Broadband) on/off switch.
. Make most of the wifi info work.
. Fix memory leak.
. Insert the right catalogs to translate UI.
. Support to show details for interface usb0.
Fixes commited in 2011 and before 4.6.0 release date:
255855, 261738, 256031: Fix crashes in Mobile Connection Wizard.
255508: Restrict the connection name label in the networkmanagement. Also corrected two typos.
. Default configuration module (kcm) to wireless tab.
. Fix crasher when an interface that's gone unavailable is disconnected.
. Changes to make cmake warns about mobile-broadband-provider-info package presence/omission.
Some important fixes commited last year:
210878: Plasma NM (and Knetworkmanager) crashes when restarting NetworkManager. Note: Not all crash cases have been fixed yet.
244416: New files for VPNC auth UI, VPNC authentication UI allowing one time secrets.
150680: Support password protected keys in OpenVPN.
. Mobile Connection Wizard to create Gsm/Cdma connections commited.
You can get a more detailed list here or cloning the repository and using git log.