Sometimes, you will hit an error without understanding why you encounter it, for example related to a mobile browser's unexpected behavior. Before asking to check mailing lists or IRC, we encourage you to make a small search in the list of issues located at Github https://github.com/openlayers/ol3/issues. You can search issues by milestone, status (opened, closed, etc), or keywords.
IRC (Internet Relay Chat) is another great place to go to if you have questions about OpenLayers. IRC is used for group communication; a big chat room, essentially. If you have exhausted Google, issues' trackers, and the mailing list, IRC provides you in real time with other people interested in OpenLayers.
Generally, the people who hang out in the OpenLayers chat room are very friendly, but please try to find an answer before asking in IRC. The server is irc.freenode.net and the chat room is #openlayers. You can download an IRC client online; a good Windows one is mIRC (http://mirc.com). More information about how to use IRC can be found at http://www.mirc.com/install.html. For beginners, we recommend using Chatzilla, a Firefox Mozilla add—on http://chatzilla.hacksrus.com or CIRC, a Google Chrome add—on http://flackr.github.io/circ/.
When you've installed it, just type irc://irc.freenode.net/openlayers (for Chatzilla only) in your browser address bar, press enter, wait and you're ready to speak on OpenLayers IRC channel.