Just a stupid little problem with Windows 7 I noticed which is VERY confusing but simple to fix.
I changed via the dialog the TEXT SIZE via the screen resolution in the control panel to CUSTOM SIZE.
With one of the newer "Cinema" or Very Wide screen (1680 X 900) displays after I'd increased the text size to over 160 % I didn't get the possibility to SAVE any documents any more via the SAVE AS button. The SAVE dialog would appear but the SAVE button was missing.
The effect was noticed in Office 2007 (all programs) Notepad etc etc.
Seems to be a Windows fault as this should not be allowed to happen.
on more traditional "Squarer" type monitors -- no problem.
I couldn't find the answer by googling but a bit of "trial and Error" fixed the problem.