diff --git a/docs/developers.txt b/docs/developers.txt
index b989da0424..2916544343 100644
--- a/docs/developers.txt
+++ b/docs/developers.txt
@@ -531,6 +531,15 @@ Some supporting maintenance and development is doable with IntelliJ IDEA,
 making some things easier to do than with a simple Notepad, but it does
 not handle C/C++ development as such.
 
+Take note that some IDEs can store their project data in the source root
+directory of a project (such as NUT codebase). While `.gitignore` rules
+can take care of not adding your local configuration into the SCM, these
+locations can be wiped by a careless `git clean -fdX`. You are advised
+to explore configuring your IDE to store project configurations outside
+the source codebase location, or to track such directories as `nbproject`
+or `nb-cache` as a separate Git repository (not necessarily a submodule
+of NUT nor really diligently tracked) to avoid such surprises.
+
 IDE notes on Windows
 ~~~~~~~~~~~~~~~~~~~~
 
diff --git a/docs/nut.dict b/docs/nut.dict
index 99f099731c..24b8f0f220 100644
--- a/docs/nut.dict
+++ b/docs/nut.dict
@@ -1,4 +1,4 @@
-personal_ws-1.1 en 3484 utf-8
+personal_ws-1.1 en 3486 utf-8
 AAC
 AAS
 ABI
@@ -2067,6 +2067,7 @@ fc
 fcb
 fcntl
 fd
+fdX
 fds
 fe
 featureReport
@@ -2599,6 +2600,7 @@ nanosleep
 nashkaminski
 natively
 nb
+nbproject
 nbr
 nbsp
 nd