If you have a left bracket in a label of a canvas, you can't open the Properties panel.
Here's the patch:
.hc
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"Information wants to be free." -Stewart Brand
#N canvas 280 95 493 618 10; #X obj 115 399 cnv 15 100 60 empty empty [withbrackets] 20 12 0 14 -233017 -66577 0; #X obj 131 73 cnv 15 100 60 empty empty withoutbrackets 20 12 0 14 -233017 -66577 0; #X text 36 35 The Properties panel works fine here:; #X text 59 370 Properties panel doesn't work here:; #X obj 105 532 cnv 15 100 60 empty empty [withleftbracket 20 12 0 14 -233017 -66577 0; #X obj 116 237 cnv 15 100 60 empty empty withrightbracket] 20 12 0 14 -233017 -66577 0; #X text 53 509 Properties panel doesn't work here:; #X text 46 169 The Properties panel works fine here:;