This has me bugging now for a while. I'm using the VBA editor in Access 2007. Sometimes, haven't seen a pattern yet, the cursor will go back and forth while I'm typing, mostly back. I may be typing "dim ", and the cursor decides to ignore the space so we now have "dim_" (where the underscore is the cursor placement). If I continue to type without looking up I may have something like "DimsTextAsString" while in fact I typed "Dim sText As String". I can then go back and insert the spaces and we are all happy.
Other times while I type something like "for i=0 to ivariable", the cursor may move back while typing the variable and I get something like "for i = 0 to ariableiv".
Very frustrating. Somethimes it helps to close Access and restart it and it appears to function normally.
I'm guessing it has something to do with Intellisense.
Haven't seen it reported somewhere else...