[TYPO3-english] BE problems with TYPO3 4.7.4

[Simon Child]

I'm having some strange BE problem after upgrading two sites to TYPO3 4.7.4

1. Clickmenu doesn't work in Filelist (tried IE8, firefox and chrome, on 
windows XP), so for example I can't copy a file (but clickmenu does work in 
Page)

2. File upload doesn't work in Chrome (the file upload dialog appears but 
nothing happens when I click 'Select files')

3. Page module - I can't add a new content element - when I click the icon 
for 'add new record after this one' I just get a blank right pane (all three 
browsers). I can however add a new content element from List

4. Editing with rtehtmlarea - in Chrome after typing 2-3 characters the 
cursor jumps back to an earlier position in the text, often deleting a block 
of text as well.

I've done the usual things like the upgrade wizard and database upgrade.

I've deleted my custom rtehtmlarea page tsconfig, and have set rtehtmlarea 
config to typical.

I've set BE compression to zero and cleared typo3temp/compressor and 
typo3temp/rtehtmlarea.

I've cleared browser caches.

After doing all this there was a slight improvement (previously rtehtmlarea 
was not working in firefox either, but it is now), but other problems 
persist - clickmenu in Filelist , creating content elements in Page, 
fileupload and rtehtmlarea in Chrome.

Anybody got any ideas please?

Thanks

Simon Child