I checked the console and got this:
Aug 31 00:33:58 Installer[2938] Can't open package /Users/kilowatt/Downloads/GIMP-Plugins-common-A-L.pkg (error opening file GIMP-Plugins-common-A-L.sizes).

Any ideas? I did try re-downloading it, no success, same error.

Fix #1
Open a terminal.
cd to the directory containing the .pkg file.
type:

code:

---

touch GIMP-Plugins-common-A-L.pkg/Contents/Resources/GIMP-Plugins-common-A-L.sizes

---

Fix #2
do all steps for Fix #1
then:

code:

---

cd GIMP-Plugins-common-A-L.pkg/Contents/Resources/
echo "NumFiles 14
InstalledSize 419
CompressedSize 152" > GIMP-Plugins-common-A-L.sizes

---

Fix #3
Do all previous steps.

code:

---

gunzip GIMP-Plugins-common-A-L.pax.gz
pax -r -f GIMP-Plugins-common-A-L.pax
mv ./usr/local/lib/gimp/1.2/plug-ins/* /usr/local/lib/gimp/1.2/plug-ins/

---

By the time you get here the plugins will be installed. I've no idea why the sizes file is missing and I would fix it but I can't download a 80 meg file, fix it and reupload it on my 14.4 =]

I get stuck unzipping GIMP-Plugins-commmon-A-L.pax.gz with an unexpected end of file errror.

How big should this file be? Mine is 72809493.

My termial session follows...

[localhost:GIMP-Plugins-common-A-L.pkg/contents/resources] cottrell% ll
total 71148
drwxr-xr-x 8 cottrell admin 264 Sep 1 07:40 .
drwxr-xr-x 3 cottrell admin 264 Jul 27 15:12 ..
-r--r--r-- 1 cottrell admin 6156 Jul 26 21:08 .DS_Store
-r--r--r-- 1 cottrell admin 22254 Jul 27 15:30 GIMP-Plugins-common-A-L.bom
-r--r--r-- 1 cottrell admin 291 Jul 30 02:41 GIMP-Plugins-common-A-L.info
-r--r--r-- 1 cottrell admin 72809493 Jul 27 15:30 GIMP-Plugins-common-A-L.pax.gz
-rw-r--r-- 1 cottrell admin 49 Sep 1 00:27 GIMP-Plugins-common-A-L.sizes
-rw-r--r-- 1 cottrell admin 627 Aug 15 15:44 Welcome.rtf

[localhost:GIMP-Plugins-common-A-L.pkg/contents/resources] cottrell% gunzip GIMP-Plugins-common-A-L.pax.gz

gunzip: GIMP-Plugins-common-A-L.pax.gz: unexpected end of file