Liking the new version, mates. I've pounded on it for a few hours, and here's an initial report.

1) Amethyst is incorrectly adding imports. Example:
import int;
import flash.utils.Endian;
import Array;
import uint;
(I don't have the reproduction steps, as these are often added without my noticing.)
2) Typing "trace(" will result in the line being changed to "Trace(" and an additional "import flash.trace.Trace" line being added. Afaik, this is new this version. (It's really annoying when trying to trace out debug information.)
3) Compiling (F7) will output errors from the Flash IDE's last compile output, not from the actual compile that takes place.
4) When attempting to add the project FLA into the solution as an Existing File (for the purposes of adding the file under automatic source control via VS), Amethyst will create a copy of the file and include that into the project instead of the selected file.
5) Creating in-line function bodies results in odd tabbing. Type: "function() { var i = 5; }" When the closing brace is typed, it will place just the closing brace on a new line, leaving the rest of the line [function(){ var i = 5; ] on the original line. Amethyst should either allow in-line bodies (my vote) or properly format the entire block according the the Amethyst options. (NB: this also affects creating Objects via the {name:value} format)
5b) I typed the following into an in-line function: cb.data["type"] = "Flower"; When I placed the closing } after the semicolon, in addition to above, the inner data was changed to read: cb.data["type"] = = "Flower"; (note the two equal signs)
6) Duplicate import lines. To reproduce, type: import flash.display.Sprit then push "Enter" to auto-complete the line. What will be written is:
import flash.display.Sprite
import flash.display.Sprite;
7) Spacing treats tab-characters as single-character width. Type the following: [tab][tab][tab][enter]xx Now push the "Up" arrow. Instead of being taken to the begging of the first tab on the prior line, the caret is instead after the second tab.