Netscape plugin 64 bits compatibility issue

Question

Hello,

I wrote a 32 bits netscape plugin that ran fine in 10.5

When 10.6 came out I converted it to 64 bits (standard 32/64 universal architecture).

I linked against SDK 10.5

The plugin works file in both 64 and 32 bits mode in 10.6 but refuses to load in 10.5

Did anybody found a way to build a plugin that is compatible for both 10.6 and 10.5 ?

Thanks,

Luc