@Lynne: The problem is that such limits are oudated. Lenght limits are coming from the early database days when there was db space limits from Hosting providers especially for users of MS_SQL (Microsoft's tricks

). I believe that many users will remember those hosting plans: 100 MB webspace, 1 database max 10MB. I think that is good in a next update to have these values changed to varchar(255).
@Gardarika: If you're running a forum in Russian you're in worst position than Greeks. Without to be 100% sure, I believe that all Russian characters (Cyrillic alphabet) are getting 4 symbols. That means that in real you've not more than 40 characters available. My suggestion is to follow what Lynne wrote. It's not that difficult, but I don't know if there are other sections needing modification. eg search table??
Edited: In case that you'll see strange characters at the end of the title, it means that somewhere there is a restriction on how many characters to show. As an example: I've seen many mods (I'm also doing it) giving you the ability to show xx characters of title (usally in widgets or forum sidebar blocks). Let's say that you set it to 30 characters. If the 30th character is a special character getting double quote space, then you'll see that strange symbol instead the real character.