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If it is just a matter of it being the skins, you might could try this:
goto startmenu
Run
Regedit
HKey_Current_User\Software\Yahoo\Pager\defaults
Under default you will see a key with the value:Indigo\indigo.xml
double-click that and delete the Indigo\indigo.xml and leave the value blank.
then goto:
HKey_Current_User\Software\Yahoo\Pager\Profiles
Locate the ID that you use and click it
After that you will see under your Profile Name a key called
(YBSkin)
select that key and look over and you will see two values
((VBSkinName)) double-click and delete the skin it has shown and leave value blank
((VBSkinned)) double-click and change its value to 0
After which Load Yahoo and it should no longer have a skin enabled
Selecting default to blank will make the skins revert to whatever skin your last logged in name skin was used .