We just published patch release for 3.6 (version 3.6.300). Only server, UI, and Windows agent installer are affected. Changes since version 3.6.273:

• Fixed bug in object tool filter configuration
• Fixed bug in map image save
• Fixed handling of tunnel options in Windows agent installer unattended mode
• Fixed issues:
          NX-1520 (Object Details - Overview tab in desktop client is unusable when using dark gtk3 theme)
          NX-1881 (Unable to open web browser from object tools for nodes have IPv6 address returned from DNS)
          NX-1906 ("Save Resources" keeps on showing when closing the console)
          NX-1943 (Dashboard element in 2nd column does not spans correctly)
          NX-1944 (Add macro that will return all tags of event in concatenated form)
          NX-1969 (Create default interface if node replies via SNMP, but provides empty interface list)
          NX-1978 (Cleanup configuration and status poll textual output)
          NX-1980 (Object Tools input field display name to wrap or input dialog to resize)
          NX-1981 (Unable to create new DCI when filter is not empty in Data Collection Configuration)
          NX-1982 (Export Configuration Tool - Unable to remove items from "Actions" and "Event Processing Rules")

Best regards,
Victor