hi everyone.... I have a BIG problem I can't solve with my squid. sometimes (randomly) I have an error in retrieving the URL in logs it appears as: 1153487449.160 2211 10.91.195.69 TCP_MISS/503 1660 GET http://www.sing365.com/music/lyric.nsf/Disposition-lyrics-Tool/C574A6A82533DECC48256A57002CEDB3 - NONE/- text/html 1153487449.332 1 10.91.195.69 TCP_MISS/503 1538 GET http://www.sing365.com/favicon.ico - NONE/- text/html 1153487455.352 45 10.91.195.69 TCP_MISS/503 1660 GET http://www.sing365.com/music/lyric.nsf/Disposition-lyrics-Tool/C574A6A82533DECC48256A57002CEDB3 - NONE/- text/html from what it's depends? where can I find the explanation of the error codes? regards, fabio