I've noticed a disturbing lack of information on the so-called "portal glitch". I've decided to compile everything I know about it into a single topic. It's not much, but it's my attempt to help.
1. What happens with this glitch?
A. I've heard the following: * Portals disappear entirely in some worlds (seems to vary between players) * Sora and Riku's forecasts exchange places (rendering them useless)
2. What causes this glitch?
A. It happens because the final world appears to be poorly programmed. Depending on how you approach it, you can undergo a character switch WITHOUT actually Dropping. For example, beating the world with Sora causes it to abruptly change to Riku WITHOUT a proper Drop. As a result, Riku gains Sora's forecast, and Sora gains Riku's. Because of this, the game becomes confused about portals and many of them disappear entirely.
3. How can I fix this glitch?
A. There are two possible ways. * The easy way: Drop twice in a row (in other words, once with each character) WITHOUT interacting with any portals. This causes the game to fix itself entirely. If you can't remember if you interacted with any portals in your current character session, just drop three times in a row for safety. * The hard way: Beat the game again the same way you did before. This is unreliable, as it is essentially "glitching the game out of its glitch".
4. How will I know if the glitch is fixed?
A. If a silhouetted portal is available (in other words, if a special portal that you've never cleared before is available), use whatever resource you prefer and track it down. If you can find it, defeat it, and if the forecast updates by filling in the silhouette, that character's forecast is fixed. You can do the same with the other character (although as far as I can tell, if one charcter is fixed, the other one should be fine as well).
If a silhouetted portal is NOT available, just try and seek out another one of the special portals available to you. The basic idea is to confirm that the forecast is giving you the correct information.
5. Is there any lasting harm to this glitch?
A. It does not appear so, no.
PSN for Dragon's Dogma: MrDifficult (Pawn: Merritt) General Use PSN: DarkestSamus