add COMPATIBILITY ISSUES section. first item; AMANDA vs dump(8)

distrib/notes/INSTALL

@@ -319,6 +319,39 @@ Preparing your System for NetBSD Installation:
 #include "prep"
 
 
+Compatibility Issues:
+------------- ------
+
+As with any system which has functionality added and products
+modified to fit within the goals of portability, standards
+adherance, and uniformity, there have been some changes which
+affects compatibility with existing NetBSD products.
+
+The following products may need the suggested work-around to
+work in NetBSD _VER:
+
+* AMANDA, The Advanced Maryland Automatic Network Disk Archiver,
+  from http://www.amanda.org
+
+  Description:
+	Due to a change in the output of dump(8) to ensure
+	consistency in the messages, AMANDA's dump output
+	parser breaks.
+
+	Error messages such as the following may be an
+	indication that this problem is present:
+
+		FAILURE AND STRANGE DUMP SUMMARY:
+		  hostname      wd0e lev 1 FAILED [no backup size line]
+	  
+  Versions affected:
+	2.3.0.4, and most likely earlier versions
+
+  Workaround/Fix:
+	Upgrade to AMANDA 2.4.0 or newer, or apply the patch found at:
+	    ftp://ftp.netbsd.org/pub/NetBSD/misc/patches/amanda-pre-2.4.patch
+
+
 Installing the NetBSD System:
 ---------- --- ------ ------