diff --git a/doc/descriptions/plustek.desc b/doc/descriptions/plustek.desc
index a20e8c5b5..6d6a02725 100644
--- a/doc/descriptions/plustek.desc
+++ b/doc/descriptions/plustek.desc
@@ -122,11 +122,11 @@
 :model "UMAX 3400"
 :interface "USB"
 :status :complete
+:comment "there are some UMAX 3400 outside the U.S. which are not supported, as they use another chipset than the LM983x"
 
 :model "UMAX 3450"
 :interface "USB"
-:status :good
-:comment "use option enableTPA 1 to enable TPA scanning"
+:status :complete
 
 :model "UMAX 5400"
 :interface "USB"
diff --git a/doc/plustek/Plustek-USB-TODO.txt b/doc/plustek/Plustek-USB-TODO.txt
index 09b2dd6a6..a05082594 100644
--- a/doc/plustek/Plustek-USB-TODO.txt
+++ b/doc/plustek/Plustek-USB-TODO.txt
@@ -1,9 +1,8 @@
-Plustek-USB-TODO.txt (2004-07-05) Gerhard Jäger <gerhard@gjaeger.de>
+Plustek-USB-TODO.txt (2004-07-26) Gerhard Jäger <gerhard@gjaeger.de>
 ====================================================================
 
 TODO (in general):
-- more documentation/comments on the different functions
--
+- more documentation/comments for the different functions
 
 
 KNOWN BUGS/Limitations:
diff --git a/doc/plustek/Plustek-USB.changes b/doc/plustek/Plustek-USB.changes
index 8062987ab..cc76dd7a5 100644
--- a/doc/plustek/Plustek-USB.changes
+++ b/doc/plustek/Plustek-USB.changes
@@ -1,8 +1,14 @@
-Plustek.changes (2004-16-07) Gerhard Jäger <gerhard@gjaeger.de>
+Plustek.changes (2004-26-07) Gerhard Jäger <gerhard@gjaeger.de>
 ===============================================================
 
 Note: All other not mentioned builds have been never released.
 
+V 0.48-4 (2004-26-07)
+---------------------
+- added speedup parameters for UMAX3400/3450
+- added disableSpeedup option
+- added UMAX3400/3450 TPA autodetection
+
 V 0.48-3 (2004-16-07)
 ---------------------
 - improved autowarmup feature