I changed my (Debian 6.0) rsyslog configuration so that it uses high-precision timestamps. Indeed it does, and it gives me microseconds, both in kernel entries and in some other entries such as puppet's. But haproxy's entries are precise to the second. For example:
2012-04-23T17:48:23.122513+03:00 debianvboxtest puppet-agent[11367]: Finished catalog run in 1.82 seconds
2012-04-23T17:49:01+03:00 debianvboxtest haproxy[11555]: Proxy http-in started.
2012-04-23T17:49:27+03:00 debianvboxtest haproxy[11556]: 192.168.1.67:39202 [23/Apr/2012:17:49:26.273] http-in http-in/server01 0/0/0/0/1046 403 324 - - ---- 0/0/0/0/0 0/0 "GET / HTTP/1.1"
Is this problem at the haproxy side or at the rsyslog side?