Mrs. Blayne tells Bob that Solly was shot on a Thursday, but the date the police said it happened was a Saturday.
Bob Corey (Gordon MacRae) and Julie Benson (Virginia Mayo) are eating dinner and discussing Steve Connelly's (Edmond O'Brien) disappearance they are drinking wine and eating and there is a bottle of wine in the middle of the table next to a burning candle. Just after a close up of MacRae when it goes to a wide shot the plates are gone as is the wine bottle and the glasses. They have been replaced by coffee cups and the waiter asking if they would like more coffee.
When Lysa visits Steve in the hospital (about 8 minutes in), she is wearing her fancy ring on her right hand. Later, during Lou's flashback (about 1:23), she is wearing it on her left hand.
When Bob is released, Julie tells him she's free "for the weekend" and will meet him at his hotel that night. However, as evidenced by the date of the telegram Bob had just received, he is being released on a Monday.
When Lysa finishes singing at the club and joins Bonnie and Steve, she places her purse on the table. The position of her purse alternates between shots from laying flat on the table, leaning against the lower base of the lamp, to leaning nearly upright against the stem of the lamp.
Every time one of the principals takes a cab, it's always the same 1936 De Soto that had been part of the WB studio inventory since the mid-1930s. It still was being used in films, though by the time this one was made, post-WWII 1946, 1947, and 1948 De Sotos had become the norm on most city streets. A real 1936 cab would have been worn out and scrapped because no cars were made for such use during the war. Likewise, the police chief of Los Angeles is still running around in another long-time pre-WWII WB veteran vehicle, a 1940 Buick 4-door sedan.
In the boxing scenes, especially in the low-angle shots, the "spectators" in the upper level of the arena are obviously inanimate paintings.
The piano music, whether from the onscreen piano or the phonograph record, sounds like two separate pieces were mixed into the soundtrack.