When I posted a message to a local sub I have no problem, but posting to DOVEnet with postmsg.js gives me this:
Reading script from /sbbs/exec/postmsg.js
/sbbs/exec/postmsg.js compiled in 0.00 seconds
!Error saving message: smb_addmsg duplicate TEXT_BODY: hash found in message #155
| Sysop: | deepend | 
|---|---|
| Location: | Calgary, Alberta | 
| Users: | 281 | 
| Nodes: | 10 (0 / 10) | 
| Uptime: | 06:36:09 | 
| Calls: | 2,402 | 
| Calls today: | 1 | 
| Files: | 5,165 | 
| D/L today: | 77  				files (26,596K bytes) | 
| Messages: | 437,434 |