type="_moz" being added to JSP textarea

After using the JSP editor, I keep finding that some JSPs have become modified where the only change is

type=”_moz”

added to textAreas e.g.

<textarea rows=”2″ cols=82% name=”${status.expression}” >
now
<textarea rows=”2″ cols=82% name=”${status.expression}” type=”_moz”>

Any ideas why this is happening, sometimes it occurs after going into preview but now always

Installation Details :-

*** Date:
05 March 2007 12:03:51 o’clock GMT

** System properties:
OS=WindowsXP
OS version=5.1
Java version=1.5.0_08

*** MyEclipse details:
MyEclipse Enterprise Workbench
Version: 5.5.0 Milestone 1
Build id: 20070123-5.5.0-Milestone1

*** Eclipse details:
MyEclipse Enterprise Workbench

Version: 5.5.0 Milestone 1
Build id: 20070123-5.5.0-Milestone1

Eclipse Platform

Version: 3.2.1.r321_v20060921-b_XVA-INSQSyMtx
Build id: M20060921-0945

Eclipse RCP

Version: 3.2.1.r321_v20060801-2ekW2BxmcpPUOoq
Build id: M20060921-0945

Eclipse Java Development Tools

Version: 3.2.1.r321_v20060905-R4CM1Znkvre9wC-
Build id: M20060921-0945

Eclipse Project SDK

Version: 3.2.1.r321_v20060801-tQ1w49KnTArT0FZ
Build id: M20060921-0945

Eclipse Graphical Editing Framework

Version: 3.2.1.v20060921
Build id: 20060921-1617

Eclipse startup command=-os
win32
-ws
win32
-arch
x86
-launcher
C:\java\MyEclipse 5.5 M1\eclipse\eclipse.exe
-name
Eclipse
-showsplash
600
-exitdata
928_80
-vm
C:\java\MyEclipse 5.5 M1\jre\bin\javaw.exe