[kronolith] Strange Delay on calender export

[lst_hoe02 at kwsoft.de]

Hello,

today we noticed a really strange problem with teh calenders of one  
user. Access by browser worked as normal, overall load on the  
webserver and on the database was low. Access by Thunderbird/Lightning  
(iCal) was near impossible. A manual download with the URL used for  
iCal abonement stalled for around 5 minutes until the file was  
delivered. Importing this file and overwriting the original calender  
immediately solved the problem. So the question is what could cause  
this stall for iCal downloads without any server load at all? Has  
anyone see something similar and what else could we check?

Regards

Andreas