sieve vacation filter not working for one user

[Maria McKinley]

I have one user who cannot get their vacation filter to work. Other 
filters work fine. I have tried moving their filter folder and 
re-creating it, and that has not helped, so I don't think the problem is 
the way squirrel mail created/edited the filter, or some corruption in 
the files themselves. Any ideas of what else could go wrong for just one 
user?

thanks,
maria