not quite sure if this is the culprit...
[debug]#0 cbEditor::OnScintillaEvent (this=0x1828eb80, event=...) at [...]\codeblocks_sf\src\sdk\cbeditor.cpp:3441
[debug]#1 0x035b5a91 in cbEditor::OnEditorModified (this=0x1828eb80, event=...) at [...]\codeblocks_sf\src\sdk\cbeditor.cpp:3363
[debug]#2 0x0c454074 in wxAppConsoleBase::HandleEvent (this=0x3187a60, handler=0x1828eb80, func=(void (wxEvtHandler::*)(wxEvtHandler * const, wxEvent &)) 0x35b57f4 <cbEditor::OnEditorModified(wxScintillaEvent&)>, event=...) at ../../src/common/appbase.cpp:611
[debug]#3 0x0c4540d0 in wxAppConsoleBase::CallEventHandler (this=0x3187a60, handler=0x1828eb80, functor=..., event=...) at ../../src/common/appbase.cpp:623
[debug]#4 0x0c576f8d in wxEvtHandler::ProcessEventIfMatchesId (entry=..., handler=0x1828eb80, event=...) at ../../src/common/event.cpp:1390
[debug]#5 0x0c577bf8 in wxEvtHandler::SearchDynamicEventTable (this=0x1828eb80, event=...) at ../../src/common/event.cpp:1749
[debug]#6 0x0c57742b in wxEvtHandler::TryHereOnly (this=0x1828eb80, event=...) at ../../src/common/event.cpp:1583
[debug]#7 0x0cd6b70c in wxEvtHandler::TryBeforeAndHere (this=0x1828eb80, event=...) at ../../include/wx/event.h:3671
[debug]#8 0x0c577263 in wxEvtHandler::ProcessEventLocally (this=0x1828eb80, event=...) at ../../src/common/event.cpp:1520
[debug]#9 0x0c577204 in wxEvtHandler::ProcessEvent (this=0x1828eb80, event=...) at ../../src/common/event.cpp:1493
[debug]#10 0x0c7aa42a in wxWindowBase::TryAfter (this=0x201c2120, event=...) at ../../src/common/wincmn.cpp:3427
[debug]#11 0x0c57722f in wxEvtHandler::ProcessEvent (this=0x201c2120, event=...) at ../../src/common/event.cpp:1506
[debug]#12 0x03714135 in wxScintilla::NotifyParent (this=0x201c2120, _scn=0x28db5c) at [...]\codeblocks_sf\src\sdk\wxscintilla\src\wxscintilla.cpp:5666
[debug]#13 0x0371777d in ScintillaWX::NotifyParent (this=0x204d1ea0, scn=...) at [...]\codeblocks_sf\src\sdk\wxscintilla\src\ScintillaWX.cpp:498
[debug]#14 0x037d0daa in Editor::NotifyModified (this=0x204d1ea0, mh=...) at [...]\codeblocks_sf\src\sdk\wxscintilla\src\scintilla\src\Editor.cxx:2706
[debug]#15 0x038130b7 in Document::NotifyModified (this=0x204d2698, mh=...) at [...]\codeblocks_sf\src\sdk\wxscintilla\src\scintilla\src\Document.cxx:2331
[debug]#16 0x03812cf6 in Document::DecorationFillRange(int, int, int)@16 (this=0x204d2698, position=39, value=0, fillLength=2101) at [...]\codeblocks_sf\src\sdk\wxscintilla\src\scintilla\src\Document.cxx:2288
[debug]#17 0x037e609d in Editor::WndProc (this=0x204d1ea0, iMessage=2505, wParam=0, lParam=2215) at [...]\codeblocks_sf\src\sdk\wxscintilla\src\scintilla\src\Editor.cxx:7458
[debug]#18 0x037eeb1c in ScintillaBase::WndProc (this=0x204d1ea0, iMessage=2505, wParam=0, lParam=2215) at [...]\codeblocks_sf\src\sdk\wxscintilla\src\scintilla\src\ScintillaBase.cxx:1086
[debug]#19 0x03718fed in ScintillaWX::WndProc (this=0x204d1ea0, iMessage=2505, wParam=0, lParam=2215) at [...]\codeblocks_sf\src\sdk\wxscintilla\src\ScintillaWX.cpp:889
[debug]#20 0x03704e39 in wxScintilla::SendMsg (this=0x201c2120, msg=2505, wp=0, lp=2215) at [...]\codeblocks_sf\src\sdk\wxscintilla\src\wxscintilla.cpp:260
[debug]#21 0x0370dc2c in wxScintilla::IndicatorClearRange (this=0x201c2120, start=0, lengthClear=2215) at [...]\codeblocks_sf\src\sdk\wxscintilla\src\wxscintilla.cpp:3800
[debug]#22 0x70a42547 in Highlighter::HighlightOccurrencesOfSelection (this=0x20369c48, ctrl=0x1828eb80) at [...]\codeblocks_sf\src\plugins\occurrenceshighlighting\highlighter.cpp:314
[debug]#23 0x70a4143b in Highlighter::Call (this=0x20369c48, ctrl=0x1828eb80, event=...) at [...]\codeblocks_sf\src\plugins\occurrenceshighlighting\highlighter.cpp:54
[debug]#24 0x70a45e57 in OccurrencesHighlighting::OnEditorHook (this=0x18cb41a8, editor=0x1828eb80, event=...) at [...]\codeblocks_sf\src\plugins\occurrenceshighlighting\occurrenceshighlighting.cpp:352
[debug]#25 0x70a88e10 in EditorHooks::HookFunctor<OccurrencesHighlighting>::Call (this=0x1fe8a860, editor=0x1828eb80, event=...) at include/editor_hooks.h:61
[debug]#26 0x0362567f in EditorHooks::CallHooks (editor=0x1828eb80, event=...) at [...]\codeblocks_sf\src\sdk\editor_hooks.cpp:122
[debug]#27 0x035b648f in cbEditor::OnScintillaEvent (this=0x1828eb80, event=...) at [...]\codeblocks_sf\src\sdk\cbeditor.cpp:3464
[debug]#28 0x035b4a4d in cbEditor::OnEditorUpdateUI (this=0x1828eb80, event=...) at [...]\codeblocks_sf\src\sdk\cbeditor.cpp:3181
[debug]#29 0x0c454074 in wxAppConsoleBase::HandleEvent (this=0x3187a60, handler=0x1828eb80, func=(void (wxEvtHandler::*)(wxEvtHandler * const, wxEvent &)) 0x35b4966 <cbEditor::OnEditorUpdateUI(wxScintillaEvent&)>, event=...) at ../../src/common/appbase.cpp:611
still debugging..