Enhydra5.1 and XMLC

Hi,

I am using Enhydra5.1 to build a barracuda based website. Every thing is 
working fine, except one thing ie during the development, when I change 
the code (just java codes, not html files), and recompile with ant, it 
recompiles the whole thing (including all html files), even though no 
changes are made and they were already compiled in earlier compilation.

I had used enhydra5.0 in the past, and it used to compile only changed 
files.  Is there any thing I can change, so that enhydra5.1 can do the same?

Any pointers would be highly appreciated.

Damar