Yes, update to 1.6.2 – it includes some fixes.
As you have WPML multilingual site you need to:
1. Set events base page in WPML default language (EM display settigns).
2. Other pages are optional, so just decline the pages notice if you don’t need them for now.
3. Create translated event base pages for each of the languages you have (just as you’d normally do with pages).
4. To have multilingual permalinks (yes, we’ve done this – something WPML can’t handle for years) go to WPML string translation and translate slugs for single event, event category, location and organizer slugs.
5. Resave WP permalinks. Basically I’d set it to /%postname%/ but it should be ok if you have /%category%/%postname%/ too.
Hope that helps.