(For users of PersonalBrain only.)
I find the icons for websites (favicons, to be precise) very useful for making thoughts stand out:
But sometimes PersonalBrain either doesn’t get them or forgets them, defaulting back to the boring standard icon:
It took me way too long to figure this out, but you can easily refresh the stored icon.
Make the thought you want to refresh the active one.
Open the properties tab or right click on the thought and select Properties and Attachments:
Right click on the link and select Refresh URL icon:
You should see the old icon change to the website’s one: