The other thing that may cause the problem is if you use NoScript in your browser and this may cause the error. When I type on your link using NoScript, NoScript automatically does not let me complete the form unless I allow it.
However not typing it correctly, as mentioned above would also cause an error.
There seems to be some difference of opinion (or else, of course, it depends on the version being used) as to whether captcha is case-sensitive. I asked about that myself, can’t remember whether it was here or over at Wilders, and was told no, it’s not case sensitive.
OK, today I got 6 (six!) eMails all containing identical text with the same key, all sent at the same time … and all without any formatting (just character by character - even no newline where expected (see below).
BTW: as I remember, the CAPTCHA here is not case sensitive and is converted into capitals automatically; but even when paying attention to it, it did not seem to work …
Hmm … could be that scripting was disabled - I usually have it turned off, but turn it on again when problems occur; I remember that the problem was persisting even after turning scripting on …
strange …
Here is the eMai I got (real key is replaced by 123ABC) with no formatting at all (buärk):
Dear avast! user,Your registration of avast! Free Antivirus was successful. Your license key must now be inserted into the program.Your license key is:---------- Cut here ----------A12345678B9012C3456-DE789FG0----------Cut here ----------To insert your license key, please follow the instructions below:1. Highlight the license key above, then right click on it and select “Copy"2. Open your avast Free Antivirus and select the Maintenance” tab on the left side. Then select "Registration"3. Click the “Insert the license key” button at the bottom of the screen.4. Right click in the empty Registration box then select "Paste"5. Click “OK”. Your license key is now inserted and the program can now be used free of charge for a further 12 months.If you experience any difficulties inserting the license key, please click here for more help:https://support.avast.com/index.php?languageid=1&group=eng&_m=knowledgebase&_a=viewarticle&kbarticleid=1037** Important notice **Please note that under the license conditions avast! Free Antivirus is for home, personal and non-commercial use only. Commercial versions of avast! can be found at:http://www.avast.comThank you for choosing avast! antivirus.The AVAST Software teamhttp://support.avast.com http://forum.avast.com