I installed the required fixes ( 188.8.131.52-IC-Multi-IFLO87330, 184.108.40.206-IC-News-IFLO87487, 220.127.116.11-IC-Common-IFLO87469, 18.104.22.168-IC-Multi-UPDI-20151224 ) in my Connections 5.5 installation.
After doing this, I log in to Connections and I see this
As you can imagine I had a moment of panic. Why on earth has the UI reverted back to 5.0 ?
Thanks to the excellent Charlie Price of IBM I found the solution: go in C:\IBM\WebSphere\AppServer\profiles\AppSrv01\temp and delete everything in there; clear your browser cache and at the next log in everything will be back to normal 🙂