The email that tripwire sends out when sending out reports contains a typo in the sender's name. The name of the sender is printed in the email as "Open Soure Tripwire(R) version number". The C letter is missing from the word source. This string is possibly defined in src/tw/twstrings.cpp - TSS_PRODUCTNAME
sorry, TSS_PRODUCT_NAME (I missed out the last underscore from the constant name).