that's getting now a huge problem in Leopard. syslogd is out of control, not only taking all CPU and memory but now, I just realized that the log file it is writing are incredibly large and have gone between 800Meg to 1G.
while I do not see a lot of post on this subject, I had found many on other forums;
http://www.virb.com/schrader/blog/531389
http://tips4mac.blogspot.com/2008/05/syslogd-maxing-your-processor-at-100.html
http://smartic.us/2007/11/8/leopard-100-cpu-usage-caused-by-syslogd-and-possibly -time-machine
http://forums.mactalk.com.au/13/39269-syslogd-using-100-my-cpu-leopard.html
none of them gives a satisfactory answer on this issue. everyone is blaming either 3rd party application or Apple software as well as Leopard's Back-To-My-Mac or Time Machine. There is no coherence between all this.
The best post I found so far is this one;
http://discussions.apple.com/thread.jspa?threadID=1203511
but still, no good answer.
I quite surprise of seeing all these forum talking about this strange and unacceptable Leopard's behaviour. It seems to me that syslogd is have a significant discrepency. Based on all this, I will give a chance to fresh and new installation of Leopard hoping this will solve the issue.