I believe the max thread limit is 60 characters - but i am looking into this.
In the meantime i have installed a new plugin which now allows you to add a description to every thread you create, which might be more useful - that way thread title's are not too long and you can add a brief description as to what the thread is about.
Hope this helps.
“Oh, I was not made for heaven. No, I don’t want to go to heaven. Hell is much better. Think of all the interesting people you’re going to meet down there” - Freddie Mercury