Well, it doesn't do that on my system. Can't help anymore, I'm afraid; since 

use Data::Dumper;
print Dumper [$cb_update_actual ->configure];

[download]

doesn't show anything related to blinkensquare, that behavior must be buried in some "no user-serviceable parts" section...

In reply to Re^7: Background Color - Tk Checkbutton by shmem
in thread Background Color - Tk Checkbutton by Bintuch

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