Audio sync issue.
The mouse issue is unfortunately a Chrome bug.
The sync issues are being worked on right now and should ship in a week.
If you could provide me a video showcasing the audio being off, that would also be extremely helpful.
Sorry about that!
Also, I have edited this post to be just the scope of the audio issue since the mouse issue is linked above and in progress on the Chrome team's end.
@vinay: Thanks Vinay, I think that the audio sync may not have existed, and was really confusion on my part due to the mouse being in the wrong position. I've tried to replicate it w/o success, so for now I think you can disregard this. I'm looking forward to you getting the mouse issue resolved b/c your tool is extremely useful to me! Thanks.
@Tim Barton: very happy you are enjoying the tool Tim! As always, we're here for you. The mouse issue is certainly an issue still and if it ever comes up again, please drop your video and OS/browser version in that separate thread I linked to. I am actively watching the Chrome bug I linked in that thread and giving input to the engineer so they can figure out what's going wrong.
As for the audio sync issues, I think a lot of them will be fixed with our 2.0 launch which will be coming in a week or so (that's why I marked this as in-progress). It certainly has been an issue I noticed on my end, and people say that YouTube even warns them about audio syncing issues from our recordings they try to upload to it.
If you really enjoy the tool, we always appreciate a good Chrome store rating, but no pressure. :-)