The BGM for the outside of the pyramid before its restoration isn't loading properly, causing an infinite error message loop that only leaves upon closing the application. Instead the BGM is silent, with the pop-up showing the song is failing to load, it interrupts dialogue, cutscenes, menu transitions, and even pops up on the main menu if you didn't close the game.

==Major Bug that will lock you out of the game and force you to restore a save==

SPOILERS.

Using 3 souls at Mansion to restore basement then going to the demon lair and using the hidden entrence for Rivieth's path will teleport you back to demon table of Lillith. If you didn't do Lillith's demon lair yet it will just block the game.

Bugs as of Version .410:
[As found using a fresh save rather than importing old data]

-Succubus Magic Extracts (bought from the succubus in the Royal City sewers) no longer function properly.
-Removing seed growth in the Overgrown Temple at >=400 does not remove the slower movement speed.  Only getting sent back by having >500 growth or exiting through the front passage restores movement speed.
-The temple of Rivith found in the mansion basement and the Royal City sewers (access given by the clown's rune) instead teleport to the Demon Nursery's temple site.  If the player has not yet completed the "special demon egg" bounty for the Lakeview Adventurer's Guild, they are softlocked from leaving by the egg sprite itself.
-The Overgrown Blueberries given by the blueberry girl in the garden do nothing (presumably inherited by earlier versions).
-Penelope (The royal princess)'s sprite clips through her bookcases after being given enough divine seeds.
-Once recruited, Sapphire (the casino bunnygirl) has an initial introduction scene in the manor and then vanishes.
-Riley (the Lakeview guild receptionist) lacks any portraits in the Crystal Room.  Talking with her mannequin only brings up a "Never mind" dialogue box.
-Despite her text referring to freeing the Dragon Isles, Ruby neither shows up in that story arc nor reacts to it being completed.
-Completing Bastet's Pyramid after defeating Toreth in the Royal City will still bring up dialogue with the party referring to their need to "clear their names" in the Royal City and will bring up a quest notification (even if the quest in question has been completed).

Spelling/Grammar:
-The battle text description for the Overgrown Temple's plant girls lacks a space or punctuation, causing the letter of the enemy to run together with the attack flavor text, e.g. "Aintensely" "Bintensely"
-Numerous homophone-heterograph typos, including to/too/two, there/their/they're, and your/you're, especially in Brasswall and Dragon Isles chapters.

Bug1: I'm not sure if this helps, but when I jumped in the well in lakeview as a heavily pregnant Leah, I got an error about failure to load: $Leahnewfacespreg3_stage2_3.png. This file does not exist. So I looked into the code on Notepad++ and on line 111 of Common Events, I found that this is the only place that this file name is referenced. I'm not sure what file it's supposed to be grabbing, but this seems to be an old bug that was never fixed.

Bug 2: As of the current build, all of the secret 'lairs' that bring you to the hooded king that kicks you out if you come to close, all link to the Brood Sanctuary south of Lakeview. Two issues with this: One, if you haven't picked up the golden egg quest, you are now soft-locked. Two,  because you entered the Brood Sanctuary from a different entrance, none of the traps do anything as the 'Egg Bar' isn't currently active.

Bug 3: You can call your boat on the passage between Royal City and Demon City, and if you sail over to the salt pile(?) on the Demon Continent and hop out of the boat, you are now soft-locked.