Adobe Indesign Cs6 Text Issue

[bazwillrun]

open a brand new document A4
draw a text box (Object Styles = basic text frame)
box fill = [Paper] white
no stroke
fill with placeholder text > calibri 10pt - colour black

so far so good (done this a gazillion times all sorts of documents...now comes the problem

Draw another text box - select text box > Object > Effects > Drop Shadow
this is to add drop shadow to the box not the text in the box

as soon as the Drop Shadow options box opens the text in the first text box (or any other text boxes for that matter it turns out )changes to a bolder than normal bold, like double bold ! (the font options dialogue doesnt show any change)

anybody know whats going on, i've wasted all morning trying to sort this out but got absolutely nowhere, tried all sorts of tests but zilch, nada, even deleted the prefs/defaults file, so it creates a new one on startup, made no difference

[Tuvok]

I only has CS3 but I would not fill a text box with colour. I would create a normal box and fill it, then I would have the text box on top of it.

Can't remember off hand what its called, but there is an option in the preferences to stop text linking itself to a box or frame.

If I'm on computer later, I'll take a look at the preferences....

[Tuvok]

Preferences - Type - turn off "Type Tool Converts Frames to Text Frames"

[bazwillrun]

Have done with and without colour fills, makes no difference.
Have got all transparency layers at the bottom of the pack and text on top layer.

Have heard mutterings that there is a known issue with transparency and drop shadow that affects some people but no know fix.

Starting to think I may have this problem

[bazwillrun]

"Preferences - Type - turn off "Type Tool Converts Frames to Text Frames"

tried that , no change

i've gone all through the preferences but cant see anything obvious relating to this.

Even did a clean install, prefs & defaults files as well but nada