diff --git a/src/PIL/BmpImagePlugin.py b/src/PIL/BmpImagePlugin.py
index f261bf6ef..5b655d757 100644
--- a/src/PIL/BmpImagePlugin.py
+++ b/src/PIL/BmpImagePlugin.py
@@ -349,6 +349,6 @@ def _save(im, fp, filename):
 Image.register_open(BmpImageFile.format, BmpImageFile, _accept)
 Image.register_save(BmpImageFile.format, _save)
 
-Image.register_extension(BmpImageFile.format, ".bmp")
+Image.register_extensions(BmpImageFile.format, [".bmp", ".dib"])
 
 Image.register_mime(BmpImageFile.format, "image/bmp")
diff --git a/src/PIL/IcoImagePlugin.py b/src/PIL/IcoImagePlugin.py
index 16683fb8f..c1c0775da 100644
--- a/src/PIL/IcoImagePlugin.py
+++ b/src/PIL/IcoImagePlugin.py
@@ -295,3 +295,5 @@ class IcoImageFile(ImageFile.ImageFile):
 Image.register_open(IcoImageFile.format, IcoImageFile, _accept)
 Image.register_save(IcoImageFile.format, _save)
 Image.register_extension(IcoImageFile.format, ".ico")
+
+Image.register_mime(IcoImageFile.format, "image/x-icon")
diff --git a/src/PIL/PcxImagePlugin.py b/src/PIL/PcxImagePlugin.py
index 8094a2866..02dbe26e0 100644
--- a/src/PIL/PcxImagePlugin.py
+++ b/src/PIL/PcxImagePlugin.py
@@ -180,3 +180,5 @@ Image.register_open(PcxImageFile.format, PcxImageFile, _accept)
 Image.register_save(PcxImageFile.format, _save)
 
 Image.register_extension(PcxImageFile.format, ".pcx")
+
+Image.register_mime(PcxImageFile.format, "image/x-pcx")
diff --git a/src/PIL/PpmImagePlugin.py b/src/PIL/PpmImagePlugin.py
index 750454dc5..1d791abf0 100644
--- a/src/PIL/PpmImagePlugin.py
+++ b/src/PIL/PpmImagePlugin.py
@@ -157,4 +157,4 @@ def _save(im, fp, filename):
 Image.register_open(PpmImageFile.format, PpmImageFile, _accept)
 Image.register_save(PpmImageFile.format, _save)
 
-Image.register_extensions(PpmImageFile.format, [".pbm", ".pgm", ".ppm"])
+Image.register_extensions(PpmImageFile.format, [".pbm", ".pgm", ".ppm", ".pnm"])
diff --git a/src/PIL/TgaImagePlugin.py b/src/PIL/TgaImagePlugin.py
index 26b1e9c60..ae9697b29 100644
--- a/src/PIL/TgaImagePlugin.py
+++ b/src/PIL/TgaImagePlugin.py
@@ -226,4 +226,6 @@ def _save(im, fp, filename):
 Image.register_open(TgaImageFile.format, TgaImageFile)
 Image.register_save(TgaImageFile.format, _save)
 
-Image.register_extension(TgaImageFile.format, ".tga")
+Image.register_extensions(TgaImageFile.format, [".tga", ".icb", ".vda", ".vst"])
+
+Image.register_mime(TgaImageFile.format, "image/x-tga")