diff --git a/src/Cafe/OS/libs/nlibcurl/nlibcurl.cpp b/src/Cafe/OS/libs/nlibcurl/nlibcurl.cpp
index 09984dad..9afb9f85 100644
--- a/src/Cafe/OS/libs/nlibcurl/nlibcurl.cpp
+++ b/src/Cafe/OS/libs/nlibcurl/nlibcurl.cpp
@@ -504,7 +504,7 @@ void export_curl_multi_fdset(PPCInterpreter_t* hCPU)
 	// fd write set
 	for (uint32 i = 0; i < h_writeFd.fd_count; i++)
 	{
-		cemu_assert_debug(false);
+		hostFdSet(h_writeFd.fd_array[i], writeFd.GetPtr());
 	}
 	// fd exception set
 	for (uint32 i = 0; i < h_exceptionFd.fd_count; i++)
@@ -906,7 +906,8 @@ int sockopt_callback(void* clientp, curl_socket_t curlfd, curlsocktype purpose)
 }
 
 size_t read_callback(char* buffer, size_t size, size_t nitems, void* instream)
-{
+{	
+	nitems = std::min<uint32>(nitems, 0x4000);
 	CURL_t* curl = (CURL_t*)instream;
 
 	cemuLog_logDebug(LogType::Force, "read_callback(0x{}, 0x{:x}, 0x{:x}, 0x{:08x}) [func: 0x{:x}]", (void*)buffer, size, nitems, curl->in_set.GetMPTR(), curl->fread_func_set.GetMPTR());
@@ -1385,4 +1386,4 @@ void load()
 	osLib_addFunction("nlibcurl", "curl_easy_cleanup", export_curl_easy_cleanup);
 	osLib_addFunction("nlibcurl", "curl_easy_pause", export_curl_easy_pause);
 }
-}
+}
\ No newline at end of file
diff --git a/src/Cafe/OS/libs/nn_olv/nn_olv.cpp b/src/Cafe/OS/libs/nn_olv/nn_olv.cpp
index 97feea8b..4290d3c2 100644
--- a/src/Cafe/OS/libs/nn_olv/nn_olv.cpp
+++ b/src/Cafe/OS/libs/nn_olv/nn_olv.cpp
@@ -5,6 +5,9 @@
 #include "nn_olv_DownloadCommunityTypes.h"
 #include "nn_olv_UploadFavoriteTypes.h"
 
+#include "Cafe/OS/libs/proc_ui/proc_ui.h"
+#include "Cafe/OS/libs/coreinit/coreinit_Time.h"
+
 namespace nn
 {
 	namespace olv
@@ -198,10 +201,35 @@ namespace nn
 			osLib_returnFromFunction(hCPU, memory_getVirtualOffsetFromPointer(&portalAppParam->serviceToken));
 		}
 
-		uint32 UploadPostDataByPostApp(void *postParam)
+		static SysAllocator<OSThread_t> s_OlvReleaseBgThread;
+		SysAllocator<uint8, 1024> s_OlvReleaseBgThreadStack;
+		SysAllocator<char, 32> s_OlvReleaseBgThreadName;
+
+		void StubPostAppReleaseBackground(PPCInterpreter_t* hCPU)
 		{
-			cemuLog_log(LogType::Force, "UploadPostDataByPostApp() called. Returning error");
-			return BUILD_NN_RESULT(NN_RESULT_LEVEL_STATUS, NN_RESULT_MODULE_NN_OLV, 0); // undefined error
+			coreinit::OSSleepTicks(ESPRESSO_TIMER_CLOCK * 2); // Sleep 2s
+			ProcUI_SendForegroundMessage();
+		}
+
+		sint32 StubPostApp(void* pAnyPostParam)
+		{
+			coreinit::OSCreateThreadType(s_OlvReleaseBgThread.GetPtr(), RPLLoader_MakePPCCallable(StubPostAppReleaseBackground), 0, nullptr, s_OlvReleaseBgThreadStack.GetPtr() + s_OlvReleaseBgThreadStack.GetByteSize(), (sint32)s_OlvReleaseBgThreadStack.GetByteSize(), 0, (1 << 1) | (1 << 3), OSThread_t::THREAD_TYPE::TYPE_APP);
+			coreinit::OSResumeThread(s_OlvReleaseBgThread.GetPtr());
+			strcpy(s_OlvReleaseBgThreadName.GetPtr(), "StubPostApp!");
+			coreinit::OSSetThreadName(s_OlvReleaseBgThread.GetPtr(),s_OlvReleaseBgThreadName.GetPtr());
+			return OLV_RESULT_SUCCESS;
+		}
+
+		sint32 StubPostAppResult()
+		{
+			return OLV_RESULT_STATUS(301); // Cancelled post app
+		}
+
+		// Somehow required, MK8 doesn't even seem to care about the error codes lol
+		char* UploadedPostData_GetPostId(char* pPostData)
+		{
+			pPostData[4] = '\0';
+			return &pPostData[4];
 		}
 
 		// https://github.com/kinnay/NintendoClients/wiki/Wii-U-Error-Codes#act-error-codes
@@ -272,8 +300,17 @@ namespace nn
 
 			osLib_addFunction("nn_olv", "GetServiceToken__Q4_2nn3olv6hidden14PortalAppParamCFv", exportPortalAppParam_GetServiceToken);
 
-			cafeExportRegisterFunc(UploadPostDataByPostApp, "nn_olv", "UploadPostDataByPostApp__Q2_2nn3olvFPCQ3_2nn3olv28UploadPostDataByPostAppParam", LogType::Placeholder);
+			cafeExportRegisterFunc(StubPostApp, "nn_olv", "UploadPostDataByPostApp__Q2_2nn3olvFPCQ3_2nn3olv28UploadPostDataByPostAppParam", LogType::Force);
+			cafeExportRegisterFunc(StubPostApp, "nn_olv", "UploadCommentDataByPostApp__Q2_2nn3olvFPCQ3_2nn3olv31UploadCommentDataByPostAppParam", LogType::Force);
+			cafeExportRegisterFunc(StubPostApp, "nn_olv", "UploadDirectMessageDataByPostApp__Q2_2nn3olvFPCQ3_2nn3olv37UploadDirectMessageDataByPostAppParam", LogType::Force);
+
+			cafeExportRegisterFunc(StubPostAppResult, "nn_olv", "GetResultByPostApp__Q2_2nn3olvFv", LogType::Force);
+			cafeExportRegisterFunc(StubPostAppResult, "nn_olv", "GetResultWithUploadedPostDataByPostApp__Q2_2nn3olvFPQ3_2nn3olv16UploadedPostData", LogType::Force);
+			cafeExportRegisterFunc(StubPostAppResult, "nn_olv", "GetResultWithUploadedDirectMessageDataByPostApp__Q2_2nn3olvFPQ3_2nn3olv25UploadedDirectMessageData", LogType::Force);
+			cafeExportRegisterFunc(StubPostAppResult, "nn_olv", "GetResultWithUploadedCommentDataByPostApp__Q2_2nn3olvFPQ3_2nn3olv19UploadedCommentData", LogType::Force);
+
+			cafeExportRegisterFunc(UploadedPostData_GetPostId, "nn_olv", "GetPostId__Q3_2nn3olv16UploadedPostDataCFv", LogType::Force);
 		}
 
 	}
-}
+}
\ No newline at end of file
diff --git a/src/Cafe/OS/libs/proc_ui/proc_ui.cpp b/src/Cafe/OS/libs/proc_ui/proc_ui.cpp
index caba7237..7de8691a 100644
--- a/src/Cafe/OS/libs/proc_ui/proc_ui.cpp
+++ b/src/Cafe/OS/libs/proc_ui/proc_ui.cpp
@@ -17,11 +17,38 @@ uint32 ProcUIInForeground(PPCInterpreter_t* hCPU)
 	return 1; // true means application is in foreground
 }
 
-uint32 ProcUIRegisterCallback(uint32 message, MPTR callback, void* data, sint32 ukn)
+struct ProcUICallback
 {
+	MPTR callback;
+	void* data;
+	sint32 priority;
+};
+std::unordered_map<uint32, ProcUICallback> g_Callbacks;
+
+uint32 ProcUIRegisterCallback(uint32 message, MPTR callback, void* data, sint32 priority)
+{
+	g_Callbacks.insert_or_assign(message, ProcUICallback{ .callback = callback, .data = data, .priority = priority });
 	return 0;
 }
 
+void ProcUI_SendBackgroundMessage()
+{
+	if (g_Callbacks.contains(PROCUI_STATUS_BACKGROUND))
+	{
+		ProcUICallback& callback = g_Callbacks[PROCUI_STATUS_BACKGROUND];
+		PPCCoreCallback(callback.callback, callback.data);
+	}
+}
+
+void ProcUI_SendForegroundMessage()
+{
+	if (g_Callbacks.contains(PROCUI_STATUS_FOREGROUND))
+	{
+		ProcUICallback& callback = g_Callbacks[PROCUI_STATUS_FOREGROUND];
+		PPCCoreCallback(callback.callback, callback.data);
+	}
+}
+
 void procui_load()
 {
 	cafeExportRegister("proc_ui", ProcUIRegisterCallback, LogType::ProcUi);
diff --git a/src/Cafe/OS/libs/proc_ui/proc_ui.h b/src/Cafe/OS/libs/proc_ui/proc_ui.h
index 4463c5d3..1cd04fb1 100644
--- a/src/Cafe/OS/libs/proc_ui/proc_ui.h
+++ b/src/Cafe/OS/libs/proc_ui/proc_ui.h
@@ -1,2 +1,5 @@
 
-void procui_load();
\ No newline at end of file
+void procui_load();
+
+void ProcUI_SendForegroundMessage();
+void ProcUI_SendBackgroundMessage();
\ No newline at end of file