It's true. In October, the Constitutional Court of Lithuania (their version of the SCOTUS) decided that no longer can people become citizens of Lithuania without renouncing their previous citizenship (of, say, the US). This decision has sent shockwaves through the diaspora community; the first email I received announcing the decision was entitled "baisus dalykas." This is clearly going to be an issue for a while now (even though the only appeal is a referendum in Lithuania).

In the meantime, I'm trying to compile a reading list of original documents about this case. I haven't really read through all of them yet, but I can give a sneak preview of my opinion: there is no inherent right to dual-citizenship in the Lithuanian constitution, nor does dual-citizenship even make sense in a post-ethnic-state world, such as the one we live in (despite the protests of our elders). The cries and complaints I'm hearing are either anachronistic or reek of entitlement.

In any case, the reading list:

• The decision.
• The press release about the decision.
• Lietuvos rytas article about the decision.
  
• Lithuanian law of citizenship (now ruled unconstitutional).
• Lithuanian constitution. 
• (US) Dual-citizenship FAQ (for a model of dual-citizenship).
• Wikipedia's entry on Dual-citizenship.
• Afroyim v. Rusk, which found the right to dual-citizenship in the 14th Amendment. (Wikipedia entry)