the multimycode is fixed on this version???
example
[spoiler]hi ^^[spoiler][/spoiler]hi again ^^[/spoiler]
it dont have mybb 1.6 on my forum and i no have a test forum
edit: not is fixed
IIRC this forum is running 1.6, so if you want to see if something works there's a specific section for that. The post above uses the so-called “nested” tags, showing that they do have a fix available.