I'm with ePost on this one. CCleaner used to delete the title bar on RealPlayer so that the last clip played was no longer displayed. This doesn't seem to be the case any longer and an update would surely be appreciated.
Try this and let me know how it works for you?
[*Real Player SP]
LangSecRef=3023
Detect=HKCU\Software\RealNetworks\RealPlayer\12.0
Default=False
RegKey1=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentClips1
RegKey2=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentClips2
RegKey3=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentClips3
RegKey4=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentClips4
RegKey5=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentClips5
RegKey6=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentClips6
RegKey7=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentClips7
RegKey8=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentClips8
RegKey9=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentSkins1
RegKey10=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentSkins2
RegKey11=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentSkins3
RegKey12=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentSkins4
RegKey13=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentSkins5
RegKey14=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentSkins6
RegKey15=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentSkins7
RegKey16=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\MostRecentSkins8
RegKey17=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\LastOpenFileDir
RegKey18=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\OpenLocationClips1
RegKey19=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\OpenLocationClips2
RegKey20=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\OpenLocationClips3
RegKey21=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\OpenLocationClips4
RegKey22=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\OpenLocationClips5
RegKey23=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\OpenLocationClips6
RegKey24=HKCU\Software\RealNetworks\RealPlayer\12.0\Preferences\OpenLocationClips7
FileKey1=%appdata%\Real\RealPlayer|RealPlayer-log.txt
FileKey2=%appdata%\Real\RealPlayer\History|*.*