update cran-comments.md

cran-comments.md

@@ -5,9 +5,19 @@ This is a resubmission. In this version I have:
 * Adopted the CRAN template for the MIT license ad LICENSE file.
 * Reduced the size of the CRAN package to < 5 MB (now at 1.8 MB).
 
+This past submission, I received an install error during the incoming-pretest, which surprised me since it (1) doesn't fail locally or with winbuilder and (2) didn't occur during my first submission.  This really surprised me, given the relatively small changes I made to the codebase.
+
+`ERROR` received:
+
+> Error in library.dynam(lib, package, package.lib) : 
+>  DLL 'dplyr' not found: maybe not installed for this architecture?
+
+I'm going to run again to see if I can recreate the issue -- sorry if this causes you extra work!
+
 ## Test environments
 * local OS X install (10.12 "Sierra"), R 3.3.3
-* win-builder (devel and release)
+* ubuntu 14.04, on travis-ci (release & devel) 
+* win-builder (devel)
 
 ## R CMD check results
 There were no `ERRORs`, `WARNINGs` or `NOTEs` when run locally on OS X.