By the way guys, if you're wondering where HM03 is, it's to the left of the Pokemon Center (right before Mt. Moon) on the pile of leaves surrounded by the 3 rocks.
Also to let you guys know, I've encountered 2 glitches in Cerulean City in Beta 6a.
1st one is trying to start the Saving Bill Chapter. When you head north of Misty's mansion towards the Rattata, the game freezes. If you walk at the far left, you pass the freezing glitch but you still can't talk to Bill who's a Rattata because the game freezes when you talk to it.
2nd one is after battling with Misty's Starmie when you encounter it in the dark in the mansion. Once they talk about battling the Cerulean City gym leader, all of the sudden Red's sprite replaces one of Misty's servant on the far right and you still see red's previous sprite at the table. From this point, you can't exit either.
*Edit: Okay after several tries, the bug for 2nd one disappear and I could exit. There's still a bug for the chapter where you save Bill. In fact it freezes up in that route. So whether you talk to Bill or just walk up there, it will freeze on you. You have to beat Misty at the gym first before you could start this chapter so don't even try to go up there because it will just freeze on you. Also walk in the middle of the path when starting this chapter. If you walk on the left or right side of the path, it freezes.
Also I notice the Lapras near the Cerulean gym in the water is where you get the Lunar Ribbon not an actual Lapras (no Lapras cry). Doesn't affect the game though.