When right clicking on a card in the browser, add an menu item so that you can view the statistics for the card .

You did an excellent job! Very useful and simple.
I have just a couple of suggestion :
1)
if a card contain an image larger than current window, please add ability to pan image (eg: using ctrl+arrow keys) and/or open it with default app (eg : double click on it).
2)
Another suggestion is to add a button other than "add, edit, delete" current card to temporary disable current card (eg assigning to a default tag thet is disabled ).
Thanks in advance
Bye :)
Max

importing a picture is a very useful function as it helps fortify associations with the answer so your brain has more information to draw on while trying to remember/ think of an answer. Although this program does this, the picture imported is always very large.

Allow the definition of multi-choice questions which you will find very often for any kind of tests.
Ex.
What colour has the sun?
a) red
b) yellow
c) green

I suggest to include again this missing and useful feature.

introduce two modes.
1. Exam mode - unlimited number of reviews at a session.
2. Normal mode - limited number of reviews at per session (5)

The normal mode would increase usage of the software by making studying easier - only a few things to learn at a time.

Not only that, this normal mode should be made up of at least 30% of familiar cards. This re-enforces old ideas and sandwiches new cards to make learning less difficult.

So you can explore with the web browser words or anything in the same time you add them.

This is helpful when learning a language with a different alphabet, especially if the time intervals can be steadily decreased. (Simply displaying the cards can't be that difficult if it can be done with AHK.)

Once you have the function for stepping down the list you can also use it to do automate searches and replaces in a set of cards. (Say, for example, to remove the "_missing" from cards after the audio file has been found.)

Problem in making Cards [when learning a foreign language.]
When adding or editing a card, we switch from Foreign to Native language many times -- while 'optimizing' the card.
Multiple switching takes time.
Suggestion:
Assign a Foreign language [user chooses it in Settings] to the Front side of Cards.
That way, as one 'clicks' on the Front side - the Foreign language is activated.
Should work in the Browser, too.

Working with flashcards featuring a lot of pictures, it would be nice to have an option for turning on an immediate preview of images while the user is still in the "edit card" tab.So no need for pressing "preview" as in preview mode of course you cannot work on the possible text you want to wrtie below your images.

Support for using already existing cloud services (dropbox, google drive ...). Then both computers don't have to be online when syncing, and you'll never have to think of syncing manually.

Perhaps it could build upon the existing sync. function in mnemosyne, instead of syncing directly to another computer, pull the data from an folder. Check the folder each time mnemosyne starts, update the folder when mnemosyne quits.

In may 2012 David Haas suggested to have Ctrl+B functionality for bold text.
SInce he did not put it in, as Peter advised, I'm doing it - bcs I need it for EVERY english vocab card.
Meanwhile, I will try to lear how to make keyboard macro, as David mentioned.

Currently it is only possible to view grades for one single sub topic at a time which does not really give you a good idea of how you are progressing. Also it could take you a long time to view all your grades; if like me you have lots of topics and subtopics.

I think it would be useful to be able to see the grades of 'active cards only'. This way you can see how you are progressing on those cards which you are working on right now.

Microsoft Office OneNote allows Screen Clipping by Win+S to take a screenshot of a certain section of your screen.
Please make it so that Mnemosyne can paste images from the screen clippings copied in the clipboard

I need to add sound to many cards, and I can do it by find and replacing some words to add the path of the sound files to the cards. Also I did some mistake in writing punctuations which I could correct all of them by find and replace. Right now I can't do it by exporting the database to another text editor because on import my learning process will be lost.

Add an option to never show the warning about learning 15 cards in a day.

I'm using the cram scheduler to review about 500 drug details. I find that assigning a number (0-5) slows the process. I just need a right or wrong and move to the next. If only there was a tool that allowed me to focus on particular cards that had the most thinking time. Donation incentive :)