If you have accidently updated to v1.24, there has been a new DotA version released recently v6.61c that allows you to basically play 6.61b. The
Quote from IceFrog:
map has no changes except the version string.
I have also updated this map in the 'Rules' section (from v6.61b to v6.61c). This has been changed in regards to people accidently downloading the new WC3 patch (If they play on Battle.net). As the matches are played on Garena, people on the new patch v1.24 can't see v1.23a hosted games and visa versa.
Please do not update to v1.24 just yet.
More details can be found here:
v1.24 Questions Answered
Taken from the Bored Aussie Website:
If you have already patched, I recommend reading this thread for solutions:
Bored Aussie
Posted on Thursday, 6th August 2009