issue 1: (image 1: pure theme): I confirme this bug. pidgin icons doesn't use transparency. But i have the same probleme with the following theme: Human, Human-clearlooks. Same things for you?
issue 2: (image 2): It's normal, it's not a bug in themes. The following themes use an image for panel background: aquadreams, balanzan, ellanna, exotic, infinity, orange, showtime, sunrise, tropical, wild shine. So you can't have transparency on panel applets. In this case, applets always use panel image as background.
issue 1: (image 1: pure theme): I confirme this bug. pidgin icons doesn't use transparency. But i have the same probleme with the following theme: Human, Human-clearlooks. Same things for you?
issue 2: (image 2): It's normal, it's not a bug in themes. The following themes use an image for panel background: aquadreams, balanzan, ellanna, exotic, infinity, orange, showtime, sunrise, tropical, wild shine. So you can't have transparency on panel applets. In this case, applets always use panel image as background.