not sure if I should post this here but...
new version (3.5) of ABBY Lingvo appears to change URL Scheme used for calling by external apps
Marvin's default "abby.lingvo://{define}" is no longer works
their new scheme is at
http://www.abbyy.com/lingvo_ios/developers/
after I corrected Lingvo button in Marvin to abby.lingvo://show_word/{define} it works again