There's a report on open.silverstripe.com listing all tickets which have the keyword "easy" added to them. This means that we assume they're not too much of a hassle to fix if you've got a good understanding of CSS, JS or a moderate understanding of SilverStripe core features.

http://open.silverstripe.com/query?status=assigned&status=new&status=reopened&group=component&order=priority&keywords=%7Eeasy&col=id&col=summary&col=keywords&col=status&col=owner&col=type&col=priority&col=reporter&report=23

We'd appreciate if you can help out with any of these tickets - if you're working on something, please add a comment on the ticket. If you're fairly sure you can solve the ticket within a reasonable timeframe, reassign to you.

The full list of core defects can be found here (for the more ambituous contributors):
http://open.silverstripe.com/query?status=assigned&status=new&status=reopened&group=priority&component=CMS+-+Field+editor&component=CMS+-+Files+and+Images+section&component=CMS+-+General&component=CMS+-+Installer&component=CMS+-+Newsletters+section&component=CMS+-+Security+section&component=CMS+-+TinyMCE+editor&component=CMS+-+Tree&component=Sapphire+Framework&component=i18n&order=priority&type=defect&col=id&col=summary&col=component&col=status&col=owner&col=milestone&col=version&col=reporter&report=26

Thanks for your help!