It's not how it affects the ROM, but how it installs over another theme that does not have the -v4... because your theme installed over the stock UDv2.0.0 theme just fine, but could not over my theme (which does not have the -v4)What version of APK manager should I be using? Also, I have though greatly about taking the -v4 off but I was unsure how it would effect the ROM
So my conclusion is that segdoh and Patrick, was trying to install your theme over another theme... purely speculation since I do not know what they had on their Droids...
On another note... Metamorphs cannot be installed into your framework-res...due to the -v4