Mac plug-ins have a generic folder icon

[Ward]

I have FileMaker Pro 8.5 Advanced installed on two Macs running 10.4.7. On one, the plug-ins in FileMaker's Extensions folder have customary icons. On the other Mac, all FM plug-ins have generic folder icons.

Although the plug-ins with the folder icons work OK, I'd really like to easily distinguish the real folders from the plug-ins.

I realize I can grab the plug-in icon from the valid Mac and paste it on each plug-in on the flaky Mac. But I'd prefer to find some way to convince the flaky Mac to behave.