I can see your problem - it seems I fixed one problem, then created a new one.
However, Adblock Plus has just dropped compatibility with SeaMonkey 1.1 (only the 2.0b1 and higher is supported) with its development builds, so there's no point in maintaining support with Adblock Plus Filter Uploader. The reason for this is that the extension support in SeaMonkey 1.1 basically sucks. Badly. The extension manager in in the Toolkit (used by Firefox, Thunderbird, SeaMonkey 2.0...) is much more advanced and makes the lives of extension developers much easier.
Re: Adblock Plus Filter Uploader 1.7.1
I can see your problem - it seems I fixed one problem, then created a new one.
However, Adblock Plus has just dropped compatibility with SeaMonkey 1.1 (only the 2.0b1 and higher is supported) with its development builds, so there's no point in maintaining support with Adblock Plus Filter Uploader. The reason for this is that the extension support in SeaMonkey 1.1 basically sucks. Badly. The extension manager in in the Toolkit (used by Firefox, Thunderbird, SeaMonkey 2.0...) is much more advanced and makes the lives of extension developers much easier.