diff -Naur thttpd-2.25b-orig/libhttpd.c thttpd-2.25b-msie_xhtml/libhttpd.c
--- thttpd-2.25b-orig/libhttpd.c	2003-12-25 20:06:05.000000000 +0100
+++ thttpd-2.25b-msie_xhtml/libhttpd.c	2007-05-01 15:14:36.000000000 +0200
@@ -2541,6 +2541,7 @@
     int i, top, bot, mid;
     int r;
     char* default_type = "text/plain; charset=%s";
+    char* nonxhtml_browser_type = "text/html";
 
     /* Peel off encoding extensions until there aren't any more. */
     n_me_indexes = 0;
@@ -2598,6 +2599,14 @@
 	    else
 		{
 		hc->type = typ_tab[mid].val;
+                if (!strncmp(typ_tab[mid].val, "application/xhtml+xml",
+                      typ_tab[mid].val_len) && strstr(hc->useragent, "MSIE"))
+                        {
+                        syslog( LOG_INFO,
+                            "Mimicing XHTML file for MSIE (User-Agent: %s)",
+                            hc->useragent);
+                        hc->type = nonxhtml_browser_type;
+                        }
 		goto done;
 		}
 	}