WTK & ECLIPSE!!

App shows blankness, and then returns to menu. No error.. just doesn't want to start.

The only difference in the jars, like I said, are the sizes of the .class files. Haven't figured out why yet..

Correct. I am not including anything I shouldn't. The jars have all the same folders/files, except Eclipse's .class files are of very slightly different sizes. And also, 7Zip tells me that the .class files are UNIX format for the Eclipse jar, and DOS format for the NetBeans jar. Geez, I hope that doesn't matter, what a silly difference. But I'm at work right now so can't investigate at the moment!

It could be anything - a compiler bug or who knows what else.  When you say the class files are the only reason it doesn't run, that almost like saying "the exe I compiled with Visual Studio runs, but the exe I compiled with GCC doesn't".  They are two completely different environments with completely different outputs.

I stuck with Netbeans since it's clear that most mobile development, particularly from Sprint, is based on Netbeans.  But then again, you are from Vancouver; isn't there a big IBM site in Vancouver?

A few things you could try
- reducing the obfuscation level, because I have heard of obfuscator issues
- decompiling the class files and comparing

You're right, I was assuming you were using Sun JDK with Netbeans and IBM's JDK with Eclipse, but if you use the same JDK for both, there goes that idea.

Is there any difference in any of the libraries that get pulled in?

And you are definitely right about Netbeans being slow.  I'd hate to use it for a large project given how long it takes to rebuild a tiny app for a phone!