When I'm replying to an email I get timed out with a message saying "Your session is invalid or expired" EVERY TIME!!
Most of the time I can't check my email because the server won't let me log in. That error message reads "Connection to IMAP server failed".
I never had problems with this webmail until RoundCube. I haven't seen an improvement, only problems. I hope when and if I get a return email to resolve these issues I'll be able to log into the email to see what the solution is.