[R] Anybody know the cause of this?

Just upgraded to R 3.3.1; when I updated the packages on CRAN, I got a BUNCH of warning messages like the ones below: 2016-07-01 14:44:19.840 R[369:3724] IMKClient Stall detected, *please Report* your user scenario attaching a spindump (or sysdiagnose) that captures the problem - (imkxpc_window

[R] Removing a dollar sign from a character vector

What I’ve got: # sessionInfo() R version 3.2.3 (2015-12-10) Platform: x86_64-apple-darwin13.4.0 (64-bit) Running under: OS X 10.11.3 (El Capitan) locale: [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] stats graphics grDevices utils datasets