I think it's a bug...

Rotated ovals are drawn centered although the “Create centered Circles” option is unchecked (2)

Left click treated as right click (4)

Copy/pasting frames overlaps old frame instead of overwriting it (2)

PM doesn't see halftone/dither patterns i created. Could not draw with custom patterns too (10)

Mouse wheel zooming not working 7.2.3.0 (4)

Brush tool is have some problems (4)

Left mouse button activating even if click with middle button (2)

Freehand Brush pickup broken in 7.2.2.1 (Steam) (2)

Merge Layers not working correctly in 7.2.2.1 (Steam) - FIXED (2)

Light table showing light table over layers (8)

Infinite "Processing, Please wait..." message, when you try to crop the image with the same size of frame (2)

Pixel Perfect Drawing Not Working With Symmetry (4)

Line Tool Misbehaving in Symmetry Mode (4)

Pixel Preview Inaccuracy in Symmetry Mode (8)

F1 shortcut are a problem (2)

Save Project does not work on a secondary monitor (11)

Drag Canvas Fails on Hidden Layers (2)

Saving to gif is problematic with effect layers (6)

Tile Map - Some Tiles not placeable (5)

Weird pen bug with display tablet (4)

Freehand pickup single click no longer works (2)

Issue With Eraser Tool / Alpha (2)

Gif shows incorrect palette (5)

Weird bug regarding brush freeform transform (4)

Brush->Make single color reverts to previous primary color (3)

All black colors become transparent (2)

Tips: Missing Text (trivial) (1)

Tile Map TMX export fails to specify renderorder attribute of <map> element (3)

Palette conversion bug (20)

Collection of Small Bugs and Useability Problems (4)