Okay. I'll bite, even though you're just going to delete this reply once again for like the third time in a row on different threads because you're a jewcy boy like that. Firefox Dev version 54.0, all javascript enabled and w7/Linux Mint.
1) Pages tend to load indefinitely, without ever updating to new replies or letting you post anything. Admittedly this only really happens in cyclical threads like this one or stickied ones, with normal threads rarely if ever doing it, but it's still a hassle as it just arbitrarily decides to stop after refreshing X times.
2) All media never fucking opens in-browser, either you wait minutes for it to accept your request or you're forced to download it, and most of the times downloading pictures results in unreasonable waiting times. Named files have longer wait periods than unix timestamp ones.
3) Webm are completely broken. Issues range wildly, from the ever present MIME error (downloading the videos doesn't help, you can't skip forward locally), pausing videos is a death sentence as it stops them downloading completely, saving videos can take anywhere from a few seconds to an indefinite amount of time (forcing you to re-download them if you're going through more than one of them), downloading any picture or sometimes even just loading another page results in the video playback stopping and never resuming, most important of all it would be real fucking neat to have a list of supported codecs or details about individual videos before downloading them and to better understand what formats are allowed - on that note, allow more file formats, you dunces.
3) Captchas have been fixed somewhat but they're still a hassle. Sometimes, after posting something they don't load very quickly and even submitting the right code may take several seconds more than what it used to be like. Having captchas come AFTER you uploaded a post seems really dumb, the daily check should happen before you hit new reply, so that you don't upload some long ass post twice. On that note, why the hell do we have to tick that disclaimer when we already are pretty much doing so when we insert the captcha? It should start pre-ticked on, like how it's done for ads on every other major website.
4) Posting is inconsistent, sometimes posts will hang in a limbo without ever telling you whether it was submitted or not, whenever I submit a post the thread does not auto-update and even after manually updating it might take subsequent tries to get the thing working again.
5) The update counter causes unrelated issues, if it refreshes too many times it starts affecting the speed at which a thread is updated, sometimes stopping it from updating at all. I had one instance where I forgot to close a page and after coming back an hour later I could not post at all. I don't know how to replicate it but it has happened.
6) Vanwatech Origin server offline coming up a lot whenever you download multiple files and it's annoying as hell.
7) This is more of a question than an issue, but I'd really like to back up threads and the media files on them, but even using stuff like DownThemAll I'm kind of stuck having to manually untick thumbnails and unix filenames. Any chance of allowing you to directly download an entire thread?
8) TO THIS FUCKING DAY THERE IS NO WAY TO ADVERTISE YOUR OWN BOARDS PROPERLY, STOP FUCKING PANDERING TO BOOMERS AND ADD A SIMPLE TAGGING-ADVERTISEMENT FEATURE, NOBODY FUCKING USES THE RANDOM BOARD PICKER
9) Some boards with flags have issues where the flags, custom or otherwise, will not show up at all. Banners weren't back-up'd either from 8chan as weren't custom spoilers.
10) Why the fuck did you give /a/ to /animu/, like I don't really think it's an issue by itself since I liked the latter more but they basically killed a board so they could have their own, and they already own two anime related boards that have practically the same content.
11) Where is /rand21/?
12) Overall, load times in general are slow as molasses. Takes forever to get any new thread open.