Comment 2 for bug 426360

I have no /etc/Rprofile.site file, but i think you meant /etc/R/Rprofile.site, note the extra "R" directory.

secondly, the change should have added the "s" to "messages".

-ow <- options("warn")
+ow <- options("warn","show.error.messages")

after these changes, i can confirm this bug and the fix.

However a simpler solution is to just store ALL of the options by making the following changes.

-ow <- options("warn")
+ow <- options()

both of these changes filled this incredibly annoying problem for me.