Hi,
We've just begun migrating to struts 1.2.4 on our dev boxes 
and the process has mostly been smooth. There is one very 
worrying bug however. Most pages with a struts frame tag in 
have started breaking for no apparent reason. The jsp is 
usually something like

<html:frame page="/pages/subFrame.jsp" frameName="main" 
frameborder="no" marginheight="0" />

the error page along the lines of,

javax.servlet.ServletException: 
org.apache.struts.taglib.html.FrameTag.setMarginheight(I)V
        at 
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:533)
        at 
org.apache.jsp.index_jsp._jspService(index_jsp.java:140)

Not much to go on I know and the weirdest thing is if you 
adjust the tag (put a marginwidth="0" in for instance) then 
the page recompiles correctly.

It occurs to me the problem therefore is probably old jsp 
pages needing recompiling to work correctly after a struts 
upgrade. Does that seem likely, or is there possibly 
something more we're unaware of?

thanks for any confirmations/better ideas,


c

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