The only python wart I know is no block scope
for i in [1,2,3]:
print i # still visible
The only ruby wart for me is the difference between block/lambda/Proc and perly features.
Java/Go/Lua don't turn you into a omlette, with their language features. Nor do they leak memory in XS like perl.
C++ is a differnt story.
EDIT: Added JS
Here is one of the first Google hits for Ruby:
Every languages has warts. Lots of them.
section 4.7.1 if you're curious
Generally though I'd say Perl has hundreds (or maybe thousands) of warts for every one Python or Ruby has.