diff --git a/AppleWin/source/DiskImage.cpp b/AppleWin/source/DiskImage.cpp
index 1f1b38a3..6478b0d2 100644
--- a/AppleWin/source/DiskImage.cpp
+++ b/AppleWin/source/DiskImage.cpp
@@ -435,9 +435,9 @@ static bool IsValidImageSize(DWORD uImageSize)
 
 	bool bValidSize = false;
 
-	if (uImageSize >= TRACKS_STANDARD*TRACK_DENIBBLIZED_SIZE)
+	if (uImageSize >= (TRACKS_STANDARD+1)*TRACK_DENIBBLIZED_SIZE)
 	{
-		// Is uImageSize == 140KB + n*4K?
+		// Is uImageSize == 140KB + n*4K?	(where n>=1)
 		bValidSize = (((uImageSize - TRACKS_STANDARD*TRACK_DENIBBLIZED_SIZE) % TRACK_DENIBBLIZED_SIZE) == 0);
 	}
 	else
diff --git a/AppleWin/source/Frame.cpp b/AppleWin/source/Frame.cpp
index 03c3eab6..427012ba 100644
--- a/AppleWin/source/Frame.cpp
+++ b/AppleWin/source/Frame.cpp
@@ -711,6 +711,8 @@ LRESULT CALLBACK FrameWndProc (
         if (!g_bIsFullScreen)
           DrawButton((HDC)0,BTN_DRIVE1);
         SetForegroundWindow(window);
+		Sleep(500);	// Wait for SetForegroundWindow() to take affect (400ms seems OK, so use 500ms to be sure)
+		SoundCore_TweakVolumes();
         ProcessButtonClick(BTN_RUN);
       }
       else
diff --git a/AppleWin/source/SoundCore.cpp b/AppleWin/source/SoundCore.cpp
index ba2e3381..99e52bf7 100644
--- a/AppleWin/source/SoundCore.cpp
+++ b/AppleWin/source/SoundCore.cpp
@@ -421,6 +421,7 @@ void SoundCore_SetFade(eFADE FadeType)
 		{
 			// Note: Kludge for fading speaker if curr/last g_nAppMode is/was MODE_LOGO:
 			// . Bug in DirectSound? SpeakerVoice.lpDSBvoice->SetVolume() doesn't work without this!
+			// . See SoundCore_TweakVolumes() - could be this?
 			if((g_pVoices[i]->bIsSpeaker) && (g_nAppMode != MODE_LOGO) && (nLastMode != MODE_LOGO))
 			{
 				g_pVoices[i]->lpDSBvoice->GetVolume(&g_pVoices[i]->nFadeVolume);
@@ -454,6 +455,20 @@ void SoundCore_SetFade(eFADE FadeType)
 
 //-----------------------------------------------------------------------------
 
+// If AppleWin started by double-clicking a .dsk, the our window won't have focus when volumes are set (so gets ignored).
+// Subsequent setting (to the same volume) will get ignores, as DirectSound thinks that volume is already set.
+
+void SoundCore_TweakVolumes()
+{
+	for (UINT i=0; i<g_uNumVoices; i++)
+	{
+		g_pVoices[i]->lpDSBvoice->SetVolume(g_pVoices[i]->nVolume-1);
+		g_pVoices[i]->lpDSBvoice->SetVolume(g_pVoices[i]->nVolume);
+	}
+}
+
+//-----------------------------------------------------------------------------
+
 static UINT g_uDSInitRefCount = 0;
 
 bool DSInit()
diff --git a/AppleWin/source/SoundCore.h b/AppleWin/source/SoundCore.h
index 8707423f..79b7e606 100644
--- a/AppleWin/source/SoundCore.h
+++ b/AppleWin/source/SoundCore.h
@@ -33,6 +33,7 @@ bool DSZeroVoiceWritableBuffer(PVOICE Voice, char* pszDevName, DWORD dwBufferSiz
 enum eFADE {FADE_NONE, FADE_IN, FADE_OUT};
 void SoundCore_SetFade(eFADE FadeType);
 bool SoundCore_GetTimerState();
+void SoundCore_TweakVolumes();
 
 bool DSInit();
 void DSUninit();