Totally agree with the upgrade recommendation.However, IBM policy changed to accept the opening of the cases (thus the information in one of the URLs posted by OP), but the level of support will be limited. No new fixes will be developed etc.So, the case may be opened, but the outcome depends on the problem. If the analysis can't map it to a known issue for which already exists a patch, no solution will be given.
For simpler situations, like doubts, behavior clarification etc. support will be provided as usual.
All this assumes customer has S&S payed (service and support), but extended support is not necessary.I personally don't like this, because it leads customers to stay on old versions which compared to new versions of competitors lack functionality, but that's the way it goes... and I suppose most customers love this policy :)Regards.