Some experimentation with the colors of collections (feedback suggested they were a little too subdued), the layouts of the summary chart, and the overall layout of profiles for busier users go live today.
Colors. The old colors were a bit wintery portishead. These should be a little more suited to the summer sun. They will change again, and if there is demand you will be able to set your own colors at some point.
Overview layout. The timeline on the profile page is useful, but for users with a good number of collections it was getting very cluttered. The colors now match the other charts for each collection, which helps hugely. Another change moves the legend out of the way a little more effectively.
Finally - the overall layout shrinks the later collections to make the page a lot more manageable.
Feedback welcome.