diff --git a/octoprint/printer.py b/octoprint/printer.py
index 286069a..c869303 100644
--- a/octoprint/printer.py
+++ b/octoprint/printer.py
@@ -356,7 +356,7 @@ class Printer():
 				self._timelapse.onPrintjobStarted(self._filename)
 
 		# forward relevant state changes to gcode manager
-		if oldState == self._comm.STATE_PRINTING:
+		if self._comm is not None and oldState == self._comm.STATE_PRINTING:
 			if state == self._comm.STATE_OPERATIONAL:
 				self._gcodeManager.printSucceeded(self._filename)
 			elif state == self._comm.STATE_CLOSED or state == self._comm.STATE_ERROR or state == self._comm.STATE_CLOSED_WITH_ERROR:
diff --git a/octoprint/templates/index.html b/octoprint/templates/index.html
index 305227d..8bedf3e 100644
--- a/octoprint/templates/index.html
+++ b/octoprint/templates/index.html
@@ -79,7 +79,7 @@
                         </div>
                         <div class="accordion-body collapse in overflow_visible" id="files">
                             <div class="accordion-inner">
-                                <table class="table table-striped table-hover table-condensed table-hover" id="gcode_files">
+                                <table class="table table-condensed table-hover" id="gcode_files">
                                     <thead>
                                         <tr>
                                             <th class="gcode_files_name">Name</th>