I just got bitten by this one, and it's beyond me why this doesn't work!
I have several .sql files open in SQL Server Management Studio (SSMS). I'm using SQL Server 2005. I wanted to find all occurrences of a particular table anywhere in my open scripts. Sounds simple, right? Just use the find feature (Edit --> Find or Ctrl-F), enter the table name and choose All Open Documents in the Look In dropdown.
Here's the catch - I'd run some of these scripts, and their Results tabs were active. The search function failed to search the content of those Editor tabs, searching the Results tabs instead!
Come on Microsoft, this is a rookie mistake. I'd understand searching the Results tabs in addition, but certainly not to the exclusion of the Editor tabs!