If you use Supportworks for your helpdesk software you may have come across a problem recently. It is where you cannot write an email unless you switch from HTML to plain text, and even then if you are replying the body of the previous email is missing.
We noticed this happened after the huge amount of Windows updates lately and managed to pin it down to Internet Explorer 9. Removing IE9 fixes the problem and Hornbill say this problem will be fixed in the next release. Until then roll-back Internet Explorer and your problem will be fixed.
Also, in case you missed it, Linux is 20 this year (link), Firefox 5 is scheduled for 21st June, Firefox 6 is scheduled for 16th August (link) and Teachers TV is being got rid of by the Department For Education (link) on 29th April.