Merge with ecf907a25a4d8cdda484d3d829db15746b623a92

src/main/java/org/olat/core/gui/components/textboxlist/TextBoxListComponent.java

@@ -150,6 +150,9 @@ public abstract class TextBoxListComponent extends FormBaseComponentImpl {
 
 		String inputId = "textboxlistinput" + getFormDispatchId();
 		String cmd = ureq.getParameter(inputId);
+		if(cmd == null){
+			return;
+		}
 		String[] splitted = cmd.split(",");
 		ArrayList<String> cleanedItemValues = new ArrayList<String>();
 		for (String item : splitted) {

src/main/java/org/olat/portfolio/model/artefacts/FileArtefactHandler.java

@@ -172,7 +172,7 @@ public class FileArtefactHandler extends EPAbstractHandler<FileArtefact> {
 					sb.append(content);
 				}
 			} catch (Exception e) {
-				log.error("", e);
+				log.error("Could not get content of file "+file.getName()+" (file-artefact "+artefact.getKey()+")", e);
 			}
 		}
 	}

src/main/java/org/olat/shibboleth/DefaultShibbolethAuthenticationController.java

@@ -80,7 +80,7 @@ public class DefaultShibbolethAuthenticationController extends AuthenticationCon
 		
 		if (LoginModule.isGuestLoginLinksEnabled()) {
 			guestLink = LinkFactory.createLink("menu.guest", loginComp, this);
-			guestLink.setCustomEnabledLinkCSS("o_login_guests");
+			guestLink.setCustomEnabledLinkCSS("o_login_guests b_with_small_icon_left");
 		}
 		
 		mainPanel = putInitialPanel(loginComp);