diff --git a/.gitignore b/.gitignore
index 1f6c60749..0230ce28f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,8 @@ hs_err_pid*.log
 .gradle
 .gradle_home
 
+.kotlin/
+
 # Ignore Gradle build output directory
 build
 
diff --git a/src/main/java/de/bixilon/minosoft/assets/util/FileUtil.kt b/src/main/java/de/bixilon/minosoft/assets/util/FileUtil.kt
index f5e41c28e..efea1418c 100644
--- a/src/main/java/de/bixilon/minosoft/assets/util/FileUtil.kt
+++ b/src/main/java/de/bixilon/minosoft/assets/util/FileUtil.kt
@@ -16,7 +16,10 @@ package de.bixilon.minosoft.assets.util
 import com.github.luben.zstd.ZstdInputStream
 import de.bixilon.minosoft.terminal.RunConfiguration
 import javafx.scene.image.Image
-import java.io.*
+import java.io.BufferedInputStream
+import java.io.File
+import java.io.FileInputStream
+import java.io.InputStream
 import java.nio.file.Files
 import java.nio.file.Path
 
@@ -46,18 +49,6 @@ object FileUtil {
         return readFile(path.toFile(), compressed)
     }
 
-    @Deprecated("kutil 1.26.3")
-    fun File.mkdirParent() {
-        val parent = this.parentFile
-        if (parent.exists()) {
-            return
-        }
-        if (!parent.mkdirs()) {
-            throw IOException("Can not create parent of $this")
-        }
-    }
-
-
     fun createTempFile(): File {
         return Files.createTempFile(RunConfiguration.TEMPORARY_FOLDER, "", "").toFile()
     }
diff --git a/src/main/java/de/bixilon/minosoft/config/profile/manager/ProfileManagers.kt b/src/main/java/de/bixilon/minosoft/config/profile/manager/ProfileManagers.kt
index e51513f21..2771273a9 100644
--- a/src/main/java/de/bixilon/minosoft/config/profile/manager/ProfileManagers.kt
+++ b/src/main/java/de/bixilon/minosoft/config/profile/manager/ProfileManagers.kt
@@ -16,9 +16,9 @@ package de.bixilon.minosoft.config.profile.manager
 import de.bixilon.kutil.concurrent.pool.DefaultThreadPool
 import de.bixilon.kutil.concurrent.worker.unconditional.UnconditionalWorker
 import de.bixilon.kutil.exception.ExceptionUtil.ignoreAll
+import de.bixilon.kutil.file.FileUtil.mkdirParent
 import de.bixilon.kutil.file.watcher.FileWatcherService
 import de.bixilon.kutil.latch.AbstractLatch
-import de.bixilon.minosoft.assets.util.FileUtil.mkdirParent
 import de.bixilon.minosoft.config.profile.profiles.account.AccountProfileManager
 import de.bixilon.minosoft.config.profile.profiles.audio.AudioProfileManager
 import de.bixilon.minosoft.config.profile.profiles.block.BlockProfileManager
diff --git a/src/main/java/de/bixilon/minosoft/config/profile/storage/StorageProfileManager.kt b/src/main/java/de/bixilon/minosoft/config/profile/storage/StorageProfileManager.kt
index 7e6ec20d9..97239124f 100644
--- a/src/main/java/de/bixilon/minosoft/config/profile/storage/StorageProfileManager.kt
+++ b/src/main/java/de/bixilon/minosoft/config/profile/storage/StorageProfileManager.kt
@@ -22,12 +22,12 @@ import de.bixilon.kutil.collections.CollectionUtil.mutableBiMapOf
 import de.bixilon.kutil.collections.map.bi.AbstractMutableBiMap
 import de.bixilon.kutil.concurrent.lock.simple.SimpleLock
 import de.bixilon.kutil.exception.Broken
+import de.bixilon.kutil.file.FileUtil.mkdirParent
 import de.bixilon.kutil.file.watcher.FileWatcherService
 import de.bixilon.kutil.observer.DataObserver.Companion.observe
 import de.bixilon.kutil.observer.DataObserver.Companion.observed
 import de.bixilon.kutil.observer.map.bi.BiMapObserver.Companion.observedBiMap
 import de.bixilon.kutil.stream.InputStreamUtil.readAsString
-import de.bixilon.minosoft.assets.util.FileUtil.mkdirParent
 import de.bixilon.minosoft.config.profile.ProfileType
 import de.bixilon.minosoft.config.profile.ProfileUtil.isValidName
 import de.bixilon.minosoft.config.profile.profiles.Profile
diff --git a/src/main/java/de/bixilon/minosoft/gui/RenderLoop.kt b/src/main/java/de/bixilon/minosoft/gui/RenderLoop.kt
index 2804baa0a..99fa9118d 100644
--- a/src/main/java/de/bixilon/minosoft/gui/RenderLoop.kt
+++ b/src/main/java/de/bixilon/minosoft/gui/RenderLoop.kt
@@ -100,7 +100,7 @@ class RenderLoop(
             context.camera.draw()
 
             // handle opengl context tasks, but limit it per frame
-            context.queue.timeWork(RenderConstants.MAXIMUM_QUEUE_TIME_PER_FRAME)
+            context.queue.workTimeLimited(RenderConstants.MAXIMUM_QUEUE_TIME_PER_FRAME)
 
             if (context.state == RenderingStates.STOPPED) {
                 context.window.close()
diff --git a/src/main/java/de/bixilon/minosoft/gui/eros/main/play/server/card/FaviconManager.kt b/src/main/java/de/bixilon/minosoft/gui/eros/main/play/server/card/FaviconManager.kt
index f7779578f..45533a1a8 100644
--- a/src/main/java/de/bixilon/minosoft/gui/eros/main/play/server/card/FaviconManager.kt
+++ b/src/main/java/de/bixilon/minosoft/gui/eros/main/play/server/card/FaviconManager.kt
@@ -14,10 +14,10 @@
 package de.bixilon.minosoft.gui.eros.main.play.server.card
 
 import com.github.luben.zstd.ZstdOutputStream
+import de.bixilon.kutil.file.FileUtil.mkdirParent
 import de.bixilon.kutil.hash.HashUtil.sha256
 import de.bixilon.minosoft.assets.util.FileAssetsTypes
 import de.bixilon.minosoft.assets.util.FileUtil
-import de.bixilon.minosoft.assets.util.FileUtil.mkdirParent
 import de.bixilon.minosoft.assets.util.FileUtil.readImage
 import de.bixilon.minosoft.assets.util.PathUtil
 import de.bixilon.minosoft.config.profile.profiles.eros.server.entries.AbstractServer
diff --git a/src/main/java/de/bixilon/minosoft/gui/rendering/sound/AudioPlayer.kt b/src/main/java/de/bixilon/minosoft/gui/rendering/sound/AudioPlayer.kt
index 2dd633f5f..22f7de31e 100644
--- a/src/main/java/de/bixilon/minosoft/gui/rendering/sound/AudioPlayer.kt
+++ b/src/main/java/de/bixilon/minosoft/gui/rendering/sound/AudioPlayer.kt
@@ -234,7 +234,7 @@ class AudioPlayer(
             if (session.established || session.error != null) {
                 break
             }
-            queue.work()
+            queue.workBlocking(500L)
             calculateAvailableSources()
             while (!enabled) {
                 Thread.sleep(1L)
@@ -242,7 +242,6 @@ class AudioPlayer(
                     break
                 }
             }
-            Thread.sleep(1L)
         }
     }