Interesting. I don't think we can really talk about those things as glitches in the game, since neither I nor my wife have those kinds of issues. Rather, I think some, if not all, of what you're referring to indicates that the game's practical system requirements are higher than perhaps your equipment or Internet connectivity are able to provide. I play at three locations, and at all three, load time is almost always less than 20 seconds, and often less than 5 seconds. My avatar is all white, and my plots show up as grass, only once or twice a week, and even then, only for about five or six minutes (during which time I've assumed that Zynga is running some sort of backup process on their servers, which necessitate the issue). I have quite often expressed concern about what I've seen in terms of how much the game seems to tax my system -- far more than I think a game should. However, they could just be aiming to optimize the game for more modern, beefier hardware and connectivity.
I have noticed, by the way, a very very very substantial difference in performance between running the game within Firefox versus Microsoft Internet Explorer. FarmVille runs substantially faster, more reliably, and less invasively within Microsoft Internet Explorer. Unfortunately, I've also noticed that Facebook runs better in Firefox. So basically the way I play the game is by logging into Facebook using Firefox, clicking the bonuses in the News Feed, and accepting gifts and such (making sure that the game itself doesn't load using FlashBlock), and then logging out. Then I log into the FarmVille.com using Microsoft Internet Explorer, to play the game itself.