TortoiseSVN crashes

Hi,

After updating to TortoiseSVN 1.6.99, Build 21709 - 32 Bit ,
2011/07/22 16:21:33, a crash follows each operations with repository
(some operations works fine, some fails, but crash report after each).
Crash message is about memory 0x0200ad24 reading. System is Windows XP
professional.

When I try to update one of repository folders, I get the message,
witch screenshot is in the attachment. What can I do with this?

Thank you.