Can´t see the Captchas letters on Rapidshare

I have trouble using RS-free account, cause for some days now I can´t see the so called "Captchas" to unlock the download.
RS only says they modified them but gives no solution to download another way. Is it my problem using IE7 and latest opera, what can I do, I don´t need premium account, cause I only download once or twice a month.