The translation strings are shared between versions
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Don't give much importance for translating for a certain version only, the strings which are done for a release, those are reused for all the other releases. As for you case, it matters only when you export the strings, then you should choose the right version both for drupal and the release.

I use ff under debian lenny, I didn't encounter any kind of trouble lately. Freezing was caused in 2.0.0.11 by a flash player addon, but since I upgraded, the issue ain't happening anymore.
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RAk