First it was showing Xamarin.Android.Support.V4 (126.96.36.199 available) though it is already at V188.8.131.52. Today I updated XLabs.Forms to V2.0.5530. With this update the '... available' on Xamarin.Android.Support.V4 is gone but now every 'Packages' folder shows that 4 updates are available. When this folder is opened up, (2.0.5530 available) is shown for each of XLabs.Core, IoC, Platform, Serialization packges.
However there are no issue with building the projects.
Has anyone else found the same? I suppose this is a bug in XS. Currently I have Xamarin Studio V5.7.1 (build 17).