Just ran into a regression in old code that last worked [probably] with 1.32 -- I have a number of ADTs which use tellg()/seekg() in their implementations of operator>>. This used to work fine with lexical_cast and now it breaks because the [optimized?] version in 1.39 uses a statically allocated buffer and plain Jane basic_streambuf which does not implement seekpos() and seekoff(). According to http://www.boost.org/doc/libs/1_45_0/libs/conversion/lexical_cast.htm#n1973, operator>> called from a lexical_cast should have at least basic_stringbuf to work with. Now, this project is locked into 1.39 for administrative reasons and I will have to work around the issue anyway. Still, I'm curious whether this is a problem that has been fixed since 1.39, a previously unnoticed bug or a by-design behavior that I am misinterpreting as a violation of spec... Thanks in advance, ...Max...