Fixes for #32, #43, #64, #67, #68, #71, #75, #77, #83, #84, #88, #89

Issues #32 (closed), #43 (closed), #64 (closed), #67 (closed), #68 (closed), #71 (closed), #75 (closed), #77 (closed), #83 (closed), #84 (closed), #88 (closed), #89 (closed).