[Samba] Winbindd growing

[Simone]

Hi list,
I have a samba 3.0.2a running on a Red Hat EL 3.0 in a ADS win2k domain. 
The server is a domain member and all is working just fine. People connect 
to the shares using kerberos, no problems. I'm a bit worried cause winbindd 
is growing every day, if I look at the running processes through webmin I get


9972   root    166452 kB    winbindd    -B

This morning the process was 139000 Kb. Last week I've had samba crashing 
for the first time, or better, winbindd crashing, cause restarting it 
solved the problem.
What I could check before restarting winbindd was it's size around 
140000Kb. Is it normal that winbindd grows that much? We have only 40 
clients and the traffic is not heavy at all.

As usual any suggestion really appreciated.
Have a nice day

Simone