You can try to contact Lotus and ask them when the new version will be there or if they have any suggestion, otherwise you can keep using jaunty or preload an old gtk version to run lotus or try to build a patched gtk with the upstream change
You can try to contact Lotus and ask them when the new version will be there or if they have any suggestion, otherwise you can keep using jaunty or preload an old gtk version to run lotus or try to build a patched gtk with the upstream change