191 15:19:59.2 192.168.0.1 192.168.0.6 SMB Trans2 Request,
QUERY_PATH_INFO, Query File Unix Basic, Path: \.Trash-usr

192 15:19:59.2 192.168.0.6 192.168.0.1 SMB Trans2 Response, QUERY_PATH_INFO

193 15:19:59.2 192.168.0.1 192.168.0.6 TCP 57509 > microsoft-ds [ACK]
Seq=3000 Ack=4950 Win=2615 Len=0 TSV=1730897 TSER=85150448

195 15:20:03.2 192.168.0.1 192.168.0.6 SMB Trans2 Request,
QUERY_PATH_INFO, Query File Unix Basic, Path: \.Trash-usr

196 15:20:03.2 192.168.0.6 192.168.0.1 SMB Trans2 Response, QUERY_PATH_INFO

197 15:20:03.2 192.168.0.1 192.168.0.6 TCP 57509 > microsoft-ds [ACK]
Seq=3100 Ack=5115 Win=2615 Len=0 TSV=1731897 TSER=85150848

From Ethereal/Wireshark.
192.168.0.6 being the server of the SMB share I set up using cifs.

*Every* four seconds. Even Windoze doesn't do this, this can't be normal?