If the find+replace dialog was left open while switching to a new file, the find and replace text values in the dialog would revert to those used on the last actual search, instead of remaining as-is.
BYOND Version:479
Operating System:Windows Vista Home Basic
Web Browser:Firefox 3.6.13
Applies to:Dream Maker
Status: Resolved (480)

This issue has been resolved.
Descriptive Problem Summary:
When you switch from one .dm file to another, the find/replace queries reset to the last search you performed.

Expected Results:
They shouldn't reset.

When does the problem NOT occur?
Tested in a few different programs; wasn't able to find a situation in which it didn't occur.

Perform a "test search" before switching files.
I don't quite follow what you mean about the resetting here. A more concrete set of steps to follow would be helpful for me. I tried some tests on this and didn't find anything unusual.
You can leave the find/replace window open as you switch between .dm files. If you change either of the input options and then switch to a different .dm file WITHOUT having searched yet, it resets the inputs to the last queries you submitted.
That happens whether you switch files or not. I don't really consider it a bug because until you actually perform a search the values don't get counted as finalized.