Hey I'm not talking about "real" and "unreal" bugs. It's about simplicity of using construct. Would be great adding one of those tips, that you see when using any panel for the first time (for ex. when you set "fixed" fps rate you getting warning tip) for the (in this case) sprite object something like "For internal calculations Construct using PNG32" to prevent further confusing about file types.
Further more even Wiki is making you confuse about it.
Quote from this page
[quote:1afisseu]From left to right the items on the Menu Bar are as follows:
Open: Open an existing image file. Supported file types are .png, .jpg, and .bmp. The Picture Editor will correctly automatically apply alpha channel information for .png images, so images with transparency will be imported correctly
No word about it's 32bit-ness.
And btw construct is for people with gamedev experience and without game experience. So it's a bug at min 50% sureness), it's like I have png - it doesn't work. Wiki sais it does. I go posting on "Help'n'Support"