C2 r59; Windows XP SP3; FireFox 7.0; ATI Radeon HD 4870
Dual-core E5200 2.5 GhZ; 3,5 Go RAM
Create new project
Create Sprite - Double click it
Right click in animation window - Add animation
Press enter
=>
<img src="http://dl.dropbox.com/u/36472942/construct/bugs/r59-animationwindow.png" border="0" />
I already reported something similar in a previous version, you had greatly improved it, only this little quirk stood, and was no big deal.
Ha digging it a bit, if I add a new frame, thinking I'm in animation2, the frame gets added to "Default" instead.