pROC 1.7.3 was pushed to the CRAN a few minutes ago. It is a bugfix release that solves two issues with smoothing, the first of which is a significant numeric issue:

• Fixed AUC of binomial-smoothed ROC off by 100^2 (thanks Bao-Li Chang for the report)
• Fix print of logcondens-smoothed ROC

It should be available for update from CRAN in a few hours / days, depending on your operating system.