Salam
When using SVN revision (now: 21464), the installer will simply break if you use mysql newer than 4.0.** which is 4.1 or 5.. it will give that error about blob/text cannot have default stuff and so... I thought that it was on windows only but I tried it on ubuntu fawn(mysql5 php5) and on dreamhost account (php5 mysql5) and on windows i tried many things :) tried php6 (installer didn't understand) php5 and mysql 4.0.26 (the only one worked) mysql 4.1. (didn't) mysql 5.2 flacon (didn't work)... note that it only don't work on svn, now i installed 1.9.3 and it was installed without problems...I guess that there is something wrong got into the sql stuff, so perhaps you can take a look...
I won't bugzilla it as I already did once and it worked for rob ;)