diff --git a/src/net/torvald/terrarum/Terrarum.kt b/src/net/torvald/terrarum/Terrarum.kt
index 94971da70..7d4196b13 100644
--- a/src/net/torvald/terrarum/Terrarum.kt
+++ b/src/net/torvald/terrarum/Terrarum.kt
@@ -167,13 +167,11 @@ object Terrarum : Disposable {
 
     val RENDER_FPS = getConfigInt("displayfps")
     val USE_VSYNC = getConfigBoolean("usevsync")
-    var VSYNC = USE_VSYNC
     val VSYNC_TRIGGER_THRESHOLD = 56
     val GL_VERSION: Int
         get() = Gdx.graphics.glVersion.majorVersion * 100 +
                 Gdx.graphics.glVersion.minorVersion * 10 +
                 Gdx.graphics.glVersion.releaseVersion
-    val MINIMAL_GL_VERSION = 210
     /*val GL_MAX_TEXTURE_SIZE: Int
         get() {
             val intBuffer = BufferUtils.createIntBuffer(16) // size must be at least 16, or else LWJGL complains
@@ -695,7 +693,6 @@ fun AppUpdateListOfSavegames() {
         println("${index+1}.\t${it.diskFile.absolutePath}")
         it.rebuild() // disk skimmer was created without initialisation, so do it now
 
-        // TODO write simple and dumb SAX parser for JSON
         val jsonFile = it.getFile(-1L)!!
         val json = JsonReader().parse(ByteArray64Reader(jsonFile.bytes, Common.CHARSET).readText())
         val worldUUID = UUID.fromString(json.getString("worldIndex"))
@@ -722,7 +719,6 @@ fun AppUpdateListOfSavegames() {
         println("${index+1}.\t${it.diskFile.absolutePath}")
         it.rebuild() // disk skimmer was created without initialisation, so do it now
 
-        // TODO write simple and dumb SAX parser for JSON
         val jsonFile = it.getFile(-1L)!!
         val json = JsonReader().parse(ByteArray64Reader(jsonFile.bytes, Common.CHARSET).readText())
         val playerUUID = UUID.fromString(json.getString("uuid"))
diff --git a/src/net/torvald/terrarum/TerrarumGLinfo.kt b/src/net/torvald/terrarum/TerrarumGLinfo.kt
index fa42e3f4c..ec0b2e82c 100644
--- a/src/net/torvald/terrarum/TerrarumGLinfo.kt
+++ b/src/net/torvald/terrarum/TerrarumGLinfo.kt
@@ -7,8 +7,7 @@ import org.lwjgl.opengl.GL11
 class TerrarumGLinfo {
     private var _initialised = false
 
-    // some JVMs don't have this property, but they probably don't have "sun.misc.Unsafe" either, so it's no big issue \_(ツ)_/
-    val MINIMAL_GL_VERSION = 320
+    val MINIMAL_GL_VERSION = 430
 
     var GL_VERSION = -1; private set
         get() = if (_initialised) field else throw UninitializedPropertyAccessException()
@@ -31,7 +30,7 @@ class TerrarumGLinfo {
 
         if (GL_VERSION < MINIMAL_GL_VERSION) {
             // TODO notify properly
-            throw GdxRuntimeException("Graphics device not capable -- device's GL_VERSION: $GL_VERSION, required: $MINIMAL_GL_VERSION")
+            throw GdxRuntimeException("Graphics device not capable -- device's GL_VERSION: $GL_VERSION, required version: $MINIMAL_GL_VERSION")
         }
 
         GL_MAX_TEXTURE_SIZE = GL11.glGetInteger(GL11.GL_MAX_TEXTURE_SIZE)
diff --git a/src/net/torvald/terrarum/savegame/VirtualDisk.kt b/src/net/torvald/terrarum/savegame/VirtualDisk.kt
index 9c81e18c3..f3b69f431 100644
--- a/src/net/torvald/terrarum/savegame/VirtualDisk.kt
+++ b/src/net/torvald/terrarum/savegame/VirtualDisk.kt
@@ -1,5 +1,7 @@
 package net.torvald.terrarum.savegame
 
+import net.torvald.terrarum.App.printdbg
+import net.torvald.terrarum.serialise.Common
 import java.io.IOException
 import java.nio.charset.Charset
 import java.util.*
@@ -152,6 +154,9 @@ class VirtualDisk(
         // make sure to write root directory first
         entries[0L]!!.let { rootDir ->
             rootDir.serialize().forEach { buffer.add(it) }
+
+            printdbg(this, "Writing disk ${getDiskName(Common.CHARSET)}")
+            printdbg(this, "Root creation: ${rootDir.creationDate}, modified: ${rootDir.modificationDate}")
         }
         entries.forEach {
             if (it.key != 0L) {
diff --git a/src/net/torvald/terrarum/serialise/GameSavingThread.kt b/src/net/torvald/terrarum/serialise/GameSavingThread.kt
index e5e9aa985..f2fe7cc42 100644
--- a/src/net/torvald/terrarum/serialise/GameSavingThread.kt
+++ b/src/net/torvald/terrarum/serialise/GameSavingThread.kt
@@ -136,7 +136,6 @@ class WorldSavingThread(
 
         Echo("Writing file to disk...")
 
-        disk.entries[0]!!.creationDate = creation_t
         disk.entries[0]!!.modificationDate = time_t
         // entry zero MUST NOT be used to get lastPlayDate, but we'll update it anyway
         // use entry -1 for that purpose!
@@ -180,6 +179,7 @@ class PlayerSavingThread(
 
         Echo("Writing The Player...")
         WritePlayer(ingame.actorGamer, disk, ingame, time_t)
+        disk.entries[0]!!.modificationDate = time_t
         VDUtil.dumpToRealMachine(disk, outFile)
 
         callback()