Hi, I've discovered a bug within textopsx to do with msg_apply_changes. After creating the new request in pkg memory it is memcpy'ed back into msg->buf. This is a issue when more than one SIP message has been read from a TCP stream. If the new request is larger it will corrupt the following message. I don't know the best way to resolve this immediately, but I felt it was worth mentioning here as you are about to release 3.2.1. Best regards, Hugh Code path to recreate bug: Send in 3 requests very quickly on a TCP stream, this is read as a single block. tcp_read.c: tcp_read_req() first message is parsed. receive_msg() -> In the cfg, insert a header (e.g. Max-Forwards: 10), msg_apply_changes() and forward. More data exists in buffer, which is shifted to the start of the buffer, however this has been overwritten. Parse fails on second request.