# New UI release (Coulson)

Fixes to stability, scalability and the upcoming v2 APIs
Fixed a bug where probe SOS messages were not recorded with certain types of probe resolvers
Added an experimental feature to limit measurements based on results per day requested, instead of number of probes or measurements
The "doughnut" in the credit history page now leads to the measurements mentioned therein
The measurement API now denies measurement specifications that are known to be unfulfillable
Fixed a bug where the quicklook page didn't update the map and the list after first answer
Added anchor IPv4/IPv6 comparison links to more (logical) places
Most maps now include the timestamp of the shown measurement
Added a "success indicator" to the probe tab for all traceroute measurements
Added a quick AS name lookup feature to the list of probes involved in a measurement
Added experimental first_connected and last_connected fields to the probe API
DomainMON now uses the NSID bit too
Added a "RIPE NCC watermark" to some of the visualisations