There are a couple of slight annoyances with the rxvt-unicode update which I'll draw attention to here.
One is that in conjunction with a recent tmux change, you'll get junk "entered" on the console in some conditions. I've patched around this in the port (9.31p0) but it's too soon to make it into packages yet. The other is that the "confirm pasting control characters" options in urxvt-confirm-paste(1) have changed; rather than a choice between y/n (paste as-is, or don't paste at all) there's now a choice of y/p/n (y=paste a sanitised version i.e. strip control characters; p=paste as-is). In particular if you're doing things like intentionally pasting a number of lines from one terminal (or xclip) to another you'll probably need to adjust finger memory and use p instead of y.