Emulator

I understand. There is:

1. Open Dolphin
2. Open DSP configuration
3. Close DSP configuration
4. Open again DSP configuration
5. Choose "Audio Backend"

Every time DPS increase number of plugins by 3.

Some code about ConfigDlg.cpp:

67 m_BackendSelection->SetToolTip(wxT("Changing this will have no effect while the
emulator is running!")); - Why? User can change this value.

Maybe this:
m_BackendSelection->SetToolTip(wxT("Choose audio backend plugin for your
opportunity."));

And there is:

void DSPConfigDialogHLE::AddBackend(const char* backend)
{
// Update values
m_BackendSelection->Append(wxString::FromAscii(backend));
#ifdef APPLE
m_BackendSelection->SetValue(wxString::FromAscii(ac_Config.sBackend));
#else
m_BackendSelection->SetValue(wxString::FromAscii(ac_Config.sBackend.c_str
()));
#endif

    // Unfortunately, DSound is the only API having a volume setting...

#ifndef _WIN32
m_volumeSlider->Disable();
m_volumeText->Disable();
#endif
}

Where is you clear your combobox? In main.cpp you address to this fucntion.

This issue between r3645 and r3675.

I can confirm this.

Oops, for got to mention it's r3661 or earlier

So it's fixed now?

Tested at r3766 - nope.