[boost] [Format] Failures on sunpro-5_3

All of the Boost.Format tests are failing on SunPro 5.3 with this error: "/home/nbde52d/src/boost-regression/boost/boost/format/ alt_sstream_impl.hpp", line 248: Error: Cannot assign void* to char*. Can this be solved, or should we mark this compiler as unusable for the Format lib? Doug