Here are a couple more of mine,
1. Radio stations that can't keep the schedule on their website up to date. Case in point, KCDD. Schedule reads as follows, 5A-10A Kidd Cradic (not sure if I spelled that right) 10A-3P, Power Midday, no jock listed. Apparently they had Rick Dease in this slot until I guess he retired, since Cumulus doesn't carry him on any of their stations anymore. There's no jock listed on that site, but they had a lady in when I listened on Wednesday. 3P-7P, Power Afternoon, Wikipedia says Leo on the radio. 7P-11P, the national show that Cumulus runs on all CHR stations. Also, they don't list the mix show on Saturday nights. Another annoying one is KKMG. They're fine weekdays, but all they say is Today's Best Music all weekend, no mention of the hip-hop program or any other programming they run on weekends on the website, and it seems the schedule on TuneIn is out of date.
2. I'm pretty sure this is a common one among blind people like myself, after a sighted person has left the computer and the blind person needs to use it again, they find the sound has been muted.