diff --git a/pages/ibox.ecpp b/pages/ibox.ecpp
index d804995b..f7b57e34 100644
--- a/pages/ibox.ecpp
+++ b/pages/ibox.ecpp
@@ -63,10 +63,18 @@ TimerConflictNotifier timerNotifier();
 			cChannel* Channel = (cChannel *)Channels->GetByNumber(cDevice::CurrentChannel());
 
 			cChannel* tmp = (cChannel *)Channels->GetByNumber(Channels->GetPrevNormal(cDevice::CurrentChannel()), -SKIP_GAP);
+#if VDRVERSNUM >= 20606
+			if (tmp)
+#else
 			if (tmp && cDevice::PrimaryDevice() && cDevice::PrimaryDevice()->HasDecoder() )
+#endif
 				prev_chan = tmp->GetChannelID();
 			tmp = (cChannel *)Channels->GetByNumber(Channels->GetNextNormal(cDevice::CurrentChannel()), SKIP_GAP);
+#if VDRVERSNUM >= 20606
+			if (tmp)
+#else
 			if (tmp && cDevice::PrimaryDevice() && cDevice::PrimaryDevice()->HasDecoder() )
+#endif
 				next_chan = tmp->GetChannelID();
 
 			const std::string chanName(Channel->Name());
diff --git a/recman.cpp b/recman.cpp
index fe51b1bf..32f3c536 100644
--- a/recman.cpp
+++ b/recman.cpp
@@ -428,28 +428,6 @@ template void StringAppendFrameParams<cToSvConcat<255>>(cToSvConcat<255> &s, con
 	  return first->scraperReleaseDate() < second->scraperReleaseDate();
 	}
 
-/*
-        int RecordingsItemPtrCompare::compareLC(const char *first, const char *second, int *numEqualChars) {
-// if numEqualChars != NULL: Add the number of equal characters to *numEqualChars
-          bool fe = !first  || !first[0];    // is first  string empty string?
-          bool se = !second || !second[0];   // is second string empty string?
-          if (fe && se) return 0;
-          if (se) return  1;
-          if (fe) return -1;
-// compare strings case-insensitive
-          for(; *first && *second; ) {
-            wint_t  flc = std::tolower<wchar_t>(getNextUtfCodepoint(first), g_locale);
-            wint_t  slc = std::tolower<wchar_t>(getNextUtfCodepoint(second), g_locale);
-            if ( flc < slc ) return -1;
-            if ( flc > slc ) return  1;
-            if (numEqualChars) (*numEqualChars)++;
-          }
-          if (*second ) return -1;
-          if (*first  ) return  1;
-          return 0;
-        }
-*/
-
   tCompRec RecordingsItemPtrCompare::getComp(eSortOrder sortOrder) {
 	  switch (sortOrder) {
 	    case eSortOrder::name: return &RecordingsItemPtrCompare::ByAscendingNameDescSort;
diff --git a/recman.h b/recman.h
index ad0fb081..c2a97217 100644
--- a/recman.h
+++ b/recman.h
@@ -165,7 +165,6 @@ template<typename T>
       static bool ByAscendingNameSort(const RecordingsItemDirPtr & first, const RecordingsItemDirPtr & second);
       static bool BySeason(const RecordingsItemDirPtr & first, const RecordingsItemDirPtr & second);
 // helpers
-//      static int compareLC(const char *first, const char *second, int *numEqualChars = NULL); // as std::compare, but compare lower case
       static int FindBestMatch(RecordingsItemRecPtr &BestMatch, const std::vector<RecordingsItemRecPtr>::const_iterator & First, const std::vector<RecordingsItemRecPtr>::const_iterator & Last, const RecordingsItemRecPtr & EPG_Entry);
 
       static tCompRec getComp(eSortOrder sortOrder);
diff --git a/stringhelpers.h b/stringhelpers.h
index 6d4ce414..973bb2fa 100644
--- a/stringhelpers.h
+++ b/stringhelpers.h
@@ -113,6 +113,7 @@ class cSv: public std::string_view {
   public:
     utf8_iterator utf8_begin() const;
     utf8_iterator utf8_end() const;
+    int compareLowerCase(cSv other, const std::locale &loc);
 };
 
 // iterator for utf8
@@ -180,6 +181,21 @@ class utf8_iterator {
 inline utf8_iterator cSv::utf8_begin() const { return utf8_iterator(*this, 0); }
 inline utf8_iterator cSv::utf8_end() const { return utf8_iterator(*this, length() ); }
 
+inline int cSv::compareLowerCase(cSv other, const std::locale &loc) {
+// compare strings case-insensitive
+  utf8_iterator ls = utf8_begin();
+  utf8_iterator rs = other.utf8_begin();
+  for (; ls != utf8_end() && rs != other.utf8_end(); ++ls, ++rs) {
+    wint_t  llc = std::tolower<wchar_t>(*ls, loc);
+    wint_t  rlc = std::tolower<wchar_t>(*rs, loc);
+    if ( llc < rlc ) return -1;
+    if ( llc > rlc ) return  1;
+  }
+  if (rs != other.utf8_end() ) return -1;
+  if (ls !=       utf8_end() ) return  1;
+  return 0;
+}
+
 
 // =========================================================
 // cStr: similar to cSv, but support c_str()
diff --git a/tasks.cpp b/tasks.cpp
index 1a1781a2..d2475891 100644
--- a/tasks.cpp
+++ b/tasks.cpp
@@ -33,23 +33,14 @@ StickyTask::~StickyTask()
 
 void SwitchChannelTask::Action()
 {
-#if VDRVERSNUM >= 20301
 	LOCK_CHANNELS_READ;
 	cChannel* channel = (cChannel *)Channels->GetByChannelID( m_channel );
-#else
-	ReadLock lock( Channels );
-	cChannel* channel = Channels.GetByChannelID( m_channel );
-#endif
 	if ( channel == 0 ) {
 		SetError( tr("Couldn't find channel or no channels available.") );
 		return;
 	}
 
-#if VDRVERSNUM >= 20301
 	if ( !Channels->SwitchTo( channel->Number() ) )
-#else
-	if ( !Channels.SwitchTo( channel->Number() ) )
-#endif
 		SetError( tr("Couldn't switch to channel.") );
 }