Hmm... good adviceThis problem tormented me. Occasionally it worked but most time NO. Could not scroll vertically.
What I did to fix the problem was to fiddle with Chrome browser screen setting. Hit Command-Minus or Command-Plus to change Chrome's resolution. Not all settings will work, which is the bad news. But the good news, is that you (well at least I) could find one that worked.
I think the problem had to do with what was mentioned above. Scroll bar was too small to allow you to select it according to Plarium code. No idea why only problems with attacking. But now it works! Fiddle with browser screen-resolution size. See if you have same results.
