I had the same problem some days ago. It's very simple to solve your
problem. Just set the mark at the left most side on some of your 75
inbox messages and then click onto the combo box with the entry
"Mark/unmark as important" and change this entry to "Move marked
to Saved messages". After that click onto the "Go" button and your
marked messages will be copied from the Inbox to the saved messages.
After that action you should have some free space in your Inbox: click
onto "Release all on-hold messages..." and these messages will appear
in your Inbox...