Upgrading to Plone 3.3 rc2 breaks LinguaPlone language selector

[afd]

I've recently upgraded a site that runs LinguaPlone 2.5 to Plone 3.3 rc2. After this upgrade, the content language switching stopped working.

Digging through, I have found that the plone.app.i18n.locales.languageselector was no longer the one offered from LinguaPlone, but the default that comes with Plone. Looking at the site's component registry XML, the LinguaPlone layer appeared to be registered as a local browser layer type (but I don't know how the layer system works with Plone), but that viewlet didn't override the default one.

I was able to fix the problem by simply click on the "Customize" template for that LP language selector viewlet. Once the customerize registration was done, the LP viewlet is overriding the default viewlet and the site works properly now.