Hi, I have come across a problem compiling Squid 3.1.18 on Ubuntu 10.04 LTS (gcc 4.4.3, latest updates from Ubuntu). The problem occurs in store.cc and has been reported in an earlier post (3 Dec 2011) related to compiling 3.1.17. Another user has also reported this issue on the squid-dev mailing list on 5 Dec 2011 but I have not seen a reply yet. The error is as follows: store.cc: In member function 'void StoreEntry::deferProducer(const RefCount<AsyncCall>&)': store.cc:376: error: no match for 'operator<<' in 'std::operator<< [with _Traits = ... My knowledge of C++ is limited so I am not sure how to resolve the problem. Someone has reported successfully compiling 3.1.18 on Solaris so perhaps the Solaris C++ libraries are a little different than in Ubuntu 10.04 LTS. I am happy to assist with any testing that might be required. Thanks Paul