diff --git a/src/gl/system/gl_interface.cpp b/src/gl/system/gl_interface.cpp
index f1babfb7f4..7f98c7f3c5 100644
--- a/src/gl/system/gl_interface.cpp
+++ b/src/gl/system/gl_interface.cpp
@@ -167,8 +167,8 @@ void gl_LoadExtensions()
 		gl.flags |= RFL_SAMPLER_OBJECTS;
 	}
 	
-	// The minimum requirement for the modern render path are GL 3.0 + uniform buffers
-	if (gl_version < 3.0f || (gl_version < 3.1f && !CheckExtension("GL_ARB_uniform_buffer_object") && strstr(gl.vendorstring, "X.Org") == nullptr))
+	// The minimum requirement for the modern render path are GL 3.0 + uniform buffers. Also exclude the Linux Mesa driver at GL 3.0 because it errors out on shader compilation.
+	if (gl_version < 3.0f || (gl_version < 3.1f && (!CheckExtension("GL_ARB_uniform_buffer_object") || strstr(gl.vendorstring, "X.Org") != nullptr)))
 	{
 		gl.legacyMode = true;
 		gl.lightmethod = LM_LEGACY;
@@ -294,10 +294,10 @@ void gl_PrintStartupLog()
 	Printf ("GL_RENDERER: %s\n", glGetString(GL_RENDERER));
 	Printf ("GL_VERSION: %s (%s profile)\n", glGetString(GL_VERSION), (v & GL_CONTEXT_CORE_PROFILE_BIT)? "Core" : "Compatibility");
 	Printf ("GL_SHADING_LANGUAGE_VERSION: %s\n", glGetString(GL_SHADING_LANGUAGE_VERSION));
-	Printf ("GL_EXTENSIONS:");
+	Printf (PRINT_LOG, "GL_EXTENSIONS:");
 	for (unsigned i = 0; i < m_Extensions.Size(); i++)
 	{
-		Printf(" %s", m_Extensions[i].GetChars());
+		Printf(PRINT_LOG, " %s", m_Extensions[i].GetChars());
 	}
 
 	glGetIntegerv(GL_MAX_TEXTURE_SIZE, &v);
diff --git a/src/r_utility.cpp b/src/r_utility.cpp
index ff34a772b3..c28422dffa 100644
--- a/src/r_utility.cpp
+++ b/src/r_utility.cpp
@@ -491,6 +491,7 @@ void R_InterpolateView (player_t *player, double Frac, InterpolationViewer *ivie
 		if (ViewPos.Z > viewsector->GetPortalPlaneZ(sector_t::ceiling))
 		{
 			ViewPos += viewsector->GetPortalDisplacement(sector_t::ceiling);
+			ViewActorPos += viewsector->GetPortalDisplacement(sector_t::ceiling);
 			viewsector = R_PointInSubsector(ViewPos)->sector;
 			moved = true;
 		}
@@ -503,6 +504,7 @@ void R_InterpolateView (player_t *player, double Frac, InterpolationViewer *ivie
 			if (ViewPos.Z < viewsector->GetPortalPlaneZ(sector_t::floor))
 			{
 				ViewPos += viewsector->GetPortalDisplacement(sector_t::floor);
+				ViewActorPos += viewsector->GetPortalDisplacement(sector_t::floor);
 				viewsector = R_PointInSubsector(ViewPos)->sector;
 				moved = true;
 			}
diff --git a/src/scripting/codegeneration/codegen.cpp b/src/scripting/codegeneration/codegen.cpp
index dc28f953c5..ed0c272700 100644
--- a/src/scripting/codegeneration/codegen.cpp
+++ b/src/scripting/codegeneration/codegen.cpp
@@ -8926,15 +8926,20 @@ ExpEmit FxSwitchStatement::Emit(VMFunctionBuilder *build)
 
 bool FxSwitchStatement::CheckReturn()
 {
-	//A switch statement returns when it contains no breaks and ends with a return
+	bool founddefault = false;
+	//A switch statement returns when it contains a no breaks, a default case, and ends with a return
 	for (auto line : Content)
 	{
 		if (line->ExprType == EFX_JumpStatement)
 		{
 			return false;	// Break means that the end of the statement will be reached, Continue cannot happen in the last statement of the last block.
 		}
+		else if (line->ExprType == EFX_CaseStatement)
+		{
+			if (static_cast<FxCaseStatement*>(line)->Condition == nullptr) founddefault = true;
+		}
 	}
-	return Content.Size() > 0 && Content.Last()->CheckReturn();
+	return founddefault && Content.Size() > 0 && Content.Last()->CheckReturn();
 }
 
 //==========================================================================