When Gabriel and his Dad are playing the song "Uncle John's Band" from the Grateful Dead album Workingman's Dead, the needle on the record player is at the very end of the LP. The song is actually the first track on the album, so the needle should be near the outer edge of the LP.
Jerry Garcia was missing part of his 3rd finger on his right hand, his finger is intact in the concert scenes.
Bing Crosby recorded "Young at Heart" for Decca Records, not RCA Victor.
"Til There Was You" was introduced in 1957 in the Broadway musical 'The Music Man', not 1950 as mentioned.
In the opening shot of the house, the year is listed as 1986 but a modern satellite dish is shown on the roof.
Takes place in 1986, but in the hospital at the nurses desk there are flat screen computer monitors running modern software.