Does anyone here know what could cause a new feature to not show up in the SharePoint UI? The solution it is part of has been correctly deployed to the GAC and shows up in the central administration list of deployed farm solutions, the feature appears in the FEATURES folder of the 14 hive, yet the feature itself does not appear in the features list for the site collection, either in the UI or in PowerShell using Get-SPFeature.
Yes, the feature is correctly scoped (at sitecol level), and no, it is not hidden. :) It doesn't appear at webapp, farm or site level either.
Any thoughts or pointers would be very welcome!