Note on bug with large output sizes

README.md

@@ -17,9 +17,10 @@ notes
 =====
 * try out a [demo]
 * currently tested only in chrome (v 21)
-* hangs firefox for some reason (on win xp anyway)
-* "save images" only works in chrome
-* probably a bunch of bugs in there
+* hangs firefox in some cases, on some OSes
+* "save images" only works in chrome (uses a@download attribute)
+* large output sizes result in corrupt images (data:// URLs too long?)
+* probably a bunch of other bugs in there
 * have patience - let it churn away for a few hours and see what you get
 
 [demo]: http://iobound.com/pareidoloop/