virtual() and output compression

During the implementation of the apache specific virtual() command for the NSAPI SAPI (virtual() includes a URI from the local server by making a sub-request, e.g. a shtml, java servlet,...) I found out that there are some missing things in documentation and/or error handling: When output compression is switched on, the inclusion of non-compressed data from the webserver is not posssible because this breaks the compression. I think that should be documented somewhere and the apache/apache2 modules should print out a error if a output filter is active. In my extension to NSAPI this is implemented. Uwe