Have played Graal for five years, dude. Never once have heard anything regarding the legitimacy of the Viewer. If the owner of a brand would let a third-party website persist for this length of time, (making its way into the hierarchy of community knowledge, and performing a heavy-lifting service) it goes without saying that it should perform efficiently and never risk defacing the brand. But obviously it doesn't, and if I were Graal owners, I'd put effort into stamping it out with an official product ASAP. Doesn't that make sense?
I didn't come here to have a battle of word-punchies. I came here to warn against use of the Viewer, and report my discoveries. It personally does me no good other than to hope that my doing so could save a fellow artist a bit of pain-in-the-ass, (as I wish that someone would've done for me). If it does, then it'll have been worth it.