Simplest suggestion: restart your computer. If that doesn't fix it, try clearing your cache (in Safari go to Safari on the menu bar and choose Empty Cache; in Firefox 3.5 go up to Tools, choose Clear Recent History..., click on the Details button, uncheck everything except Cache, choose Everything on the time range drop down, then click on Clear Now; I use a Mac so I don't know where the function is on Internet Explorer). If you recently upgraded your browser (IE 8 is now available, Firefox 3.5 just came out of beta this week, Safari 4 came out of beta a couple of weeks ago) it may be temporarily incompatible with IronSudoku, so try using a different browser to see if the problem goes away. Finally, try using a different computer if possible.
hey hk, how's it going?
some day i'm going to have to find out the real tricks that i don't know yet... these things take me far too long