diff --git a/known_bugs b/known_bugs
new file mode 100644
index 0000000..944b1a2
--- /dev/null
+++ b/known_bugs
@@ -0,0 +1 @@
+#known bugs list
diff --git a/known_problems b/known_problems
new file mode 100644
index 0000000..0257b1b
--- /dev/null
+++ b/known_problems
@@ -0,0 +1,4 @@
+#known problems that also might be bugs
+
+11-03-2010
+example Coaxial_Cartesian: field distribution with PEC != kappa very large, staircasing problem??