hmmm, looking I see the apple touch icon is left blank and the discourse note under it says “If left blank, large_icon will be used.” The image is a fuzzy image from our new logo so that looks to be correct.
Backing up from that, the large_icon further up the page is also left blank and the discourse note under it say “If left blank, logo_small will be used.” The image is the same fuzzy image as above so seems correct as well.
The logo_small near the top of the page was filled in with the new logo and the fuzzy images noted above match it, so that too all seems to be ok.
These branding changes were done in discourse several months ago so I wouldn’t think it is a caching thing in slack that would resolve itself automatically. I’ll ask internally though if they have seen the old logo show up elsewhere besides in slack postings so we can at least determine if it is a discourse-slack-specific issue.
In the meantime, do you think it could be an issue with discourse not failing back to the alternative icon noted even though the fuzzy image shown implies it is?