Hmm, just realising that clients cache images for many days. Updates may not happen as frequently for everyone as I'd have hoped.
Nostr cache systems should adhere to the http cache headers from the original media. If a media is no-cache, don't cache it. nostr:nevent1qqsqqqqq0mf3ccmzg6gv6rx0qqt2pfh0zz3mezwemaed0zmyjc4t4ycppemhxue69uhkummn9ekx7mp0qgs9tsr49h6quec9mqqxcvugxrl74v9fa69nw55yjn5x4m8r0r2k8psrqsqqqqqpg4wf4q