[boost] [lexical-cast] version of lexical_cast in 1.46.1 is quite older than in trunk

We discovered lexical_cast from 1.43 and 1.46.1 versions do not work in our program. But version of lexical_cast from trunk work very well. Version information: 1.46.1 - rev. 56161 13.09.2009 trunk - rev.65279 5.09.2010 1) Is there any reason that release does not include last version lexical_cast from trunk? 2) May be there are a lot of such forgotten files in trunk? Sergey Voropaev