I heard it was something about Firefox plugins/extras. So I disabled a few but nothing ><
I learned a few tricks by having this error for a while though. When you can't open your notes inbox, click the messages tab and then the notes again and it works.
When you're trying to send a message, changing tab and waiting a little usually works faster than keep trying.
Reloading the page doesn't work the same way as if you press the address box and press enter. I'm not sure if it changes much but, it usually doesn't work if I keep reloading the page, but does after a while if I press enter on the address box.
So these are like...little unofficial workarounds that I THINK I've found XD You know what I mean?
yeah it still happens to me D:.. The problem i guessed would be the internet connection, cause I tried using my friend's computer and everything seems perfectly ok. >_> but what i do now is before i give llama or make a comment, i open a deviation or something first in a new tab and leave it there, yeah a bit of a hassle but I dunno it seems working to me XDD