diff --git a/src/LoadModules.cpp b/src/LoadModules.cpp
index b509af623..f76e4f130 100644
--- a/src/LoadModules.cpp
+++ b/src/LoadModules.cpp
@@ -237,8 +237,6 @@ void ModuleManager::Initialize(CommandHandler &cmdHandler)
       wxString prefix = ::wxPathOnly(files[i]);
       ::wxSetWorkingDirectory(prefix);
 
-      Module *module = new Module(files[i]);
-
 #ifdef EXPERIMENTAL_MODULE_PREFS
       if( !IsAllowedModule( files[i] ) )  // don't try and check the in-date-ness before this as that means loading the module to call it's GetVersionString, which could do anything.
 #endif EXPERIMENTAL_MODULE_PREFS
@@ -254,6 +252,7 @@ void ModuleManager::Initialize(CommandHandler &cmdHandler)
             continue;
       }
 
+      Module *module = new Module(files[i]);
       if (module->Load())   // it will get rejected if there  are version problems
       {
          mInstance->mModules.Add(module);
diff --git a/src/Sequence.cpp b/src/Sequence.cpp
index 0f7d396eb..26c512bca 100644
--- a/src/Sequence.cpp
+++ b/src/Sequence.cpp
@@ -184,7 +184,11 @@ bool Sequence::ConvertToSampleFormat(sampleFormat format, bool* pbChanged)
       
       bSuccess = (pOldBlockFile->ReadData(bufferOld, oldFormat, 0, len) > 0);
       if (!bSuccess)
+      {
+         DeleteSamples(bufferNew);
+         DeleteSamples(bufferOld);
          break;
+      }
       
       CopySamples(bufferOld, oldFormat, bufferNew, mSampleFormat, len);
       
diff --git a/src/effects/ChangePitch.cpp b/src/effects/ChangePitch.cpp
index 9c8a5fc17..993a20c33 100644
--- a/src/effects/ChangePitch.cpp
+++ b/src/effects/ChangePitch.cpp
@@ -117,6 +117,10 @@ void EffectChangePitch::DeduceFrequencies()
       for(j=1; j<windowSize/2; j++)
          if (freqa[j] > freqa[argmax])
             argmax = j;
+
+      delete [] freq;
+      delete [] freqa;
+
       lag = (windowSize/2 - 1) - argmax;
       m_dStartFrequency = rate / lag;
    }
diff --git a/src/effects/Equalization.cpp b/src/effects/Equalization.cpp
index eea35cc1b..e3a4e6ff3 100644
--- a/src/effects/Equalization.cpp
+++ b/src/effects/Equalization.cpp
@@ -2675,6 +2675,9 @@ void EqualizationDialog::OnInvert(wxCommandEvent &event) // Inverts any curve
             mLogEnvelope->Move(when[i] , -value[i]);
       }
 
+      delete [] when;
+      delete [] value;
+
       // copy it back to the other one (just in case)
       if(lin)
          EnvLinToLog();
diff --git a/src/export/ExportMP2.cpp b/src/export/ExportMP2.cpp
index 04a0592b3..ceb9a5cd8 100644
--- a/src/export/ExportMP2.cpp
+++ b/src/export/ExportMP2.cpp
@@ -233,6 +233,7 @@ int ExportMP2::Export(AudacityProject *project,
    {
       wxMessageBox(_("Cannot export MP2 with this sample rate and bit rate"),
          _("Error"), wxICON_STOP);
+      twolame_close(&encodeOptions);
       return false;
    }
 
@@ -243,6 +244,7 @@ int ExportMP2::Export(AudacityProject *project,
    FileIO outFile(fName, FileIO::Output);
    if (!outFile.IsOpened()) {
       wxMessageBox(_("Unable to open target file for writing"));
+      twolame_close(&encodeOptions);
       return false;
    }
 
diff --git a/src/export/ExportPCM.cpp b/src/export/ExportPCM.cpp
index 874234920..281d58e1b 100644
--- a/src/export/ExportPCM.cpp
+++ b/src/export/ExportPCM.cpp
@@ -596,7 +596,10 @@ char *ExportPCM::ConvertTo7bitASCII(const wxString wxStr)
       return NULL;
    char *pSrc = (char *)malloc(sr);
    if (!pSrc)
+   {
+      free(pDest);
       return NULL;
+   }
    memset(pDest, 0, sr);
    memset(pSrc, 0, sr);