Also, when updating from the previous version, make these changes too:
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search for:
PHP Code:
case 3: // forwarded message
$privatemessage[folder] = "{imagesfolder}/pmforwarded.gif";
break;
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right after it insert:
PHP Code:
case 4: //backed up message
$privatemessage[folder] = "{imagesfolder}/pmbackedup.gif";
break;
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