[Seaside] [Q] Seaside 2.6b1-mb.40 and 41 differences?

["S.J.Chun"]

Hi,

After migrating to version 41, I cannot display seaside application in web browsers(at least on IE6 and Firefox 1.5.X, Opera can display... but), that is, 
blank page is displayed. But it seems that source of html does have the contents. I've tried importing 41 using fresh image but it does same.

Is there any other required process for version 41?

Thanks in advance.