[boost] guidelines on portable 'catch(...)' usage

hi there, I'v recently run into a problem with 'catch(...)' on MSVC 7.1, where a segmentation fault resulted in a 'first-class exception' (!) that was caught by 'catch(...)' even though the stack wasn't unwound. My first reaction was to abandon the use of 'catch(...)' entirely, replacing it with a more specific equivalent (which I believe to be better practice anyways). However, browsing some boost code I now find other people using such catch-all statements, and so I'd like to get your feedback on how to use it portably. Are my findings false concerning MSVC's highjacked use of C++ exceptions for program errors (i.e. POSIX' equivalent of signals) ? Thanks, Stefan