By Owen Gleiberman
Updated June 16, 2006 04:00 AM
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A minor bauble of a Robert Altman film based on Garrison Keillor’s fabled public-radio variety show. It’s like the Grand Ole Opry in small-town miniature — but, in its folksy chamber-music way, it’s a delight. What seals it is the performers’ belief in their shaggy-dog selves. With Meryl Streep, Woody Harrelson, and Lindsay Lohan.